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152440241 = 178967073
BaseRepresentation
bin10010001011000…
…00110110110001
3101121211202200212
421011200312301
5303011041431
623043153505
73530502122
oct1105406661
9347752625
10152440241
1179059678
1243075895
1325774835
1416362049
15d5b272b
hex9160db1

152440241 has 4 divisors (see below), whose sum is σ = 161407332. Its totient is φ = 143473152.

The previous prime is 152440231. The next prime is 152440271. The reversal of 152440241 is 142044251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142044251 = 236175837.

It can be written as a sum of positive squares in 2 ways, for example, as 49843600 + 102596641 = 7060^2 + 10129^2 .

It is a cyclic number.

It is not a de Polignac number, because 152440241 - 226 = 85331377 is a prime.

It is a super-2 number, since 2×1524402412 = 46476054152276162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152440231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4483520 + ... + 4483553.

It is an arithmetic number, because the mean of its divisors is an integer number (40351833).

Almost surely, 2152440241 is an apocalyptic number.

It is an amenable number.

152440241 is a deficient number, since it is larger than the sum of its proper divisors (8967091).

152440241 is an equidigital number, since it uses as much as digits as its factorization.

152440241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8967090.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 152440241 is about 12346.6692269616. The cubic root of 152440241 is about 534.1950698715.

Adding to 152440241 its reverse (142044251), we get a palindrome (294484492).

The spelling of 152440241 in words is "one hundred fifty-two million, four hundred forty thousand, two hundred forty-one".

Divisors: 1 17 8967073 152440241