152442181 has 4 divisors (see below), whose sum is σ = 155987392. Its totient is φ = 148896972.

The previous prime is 152442167. The next prime is 152442209. The reversal of 152442181 is 181244251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 181244251 = 701 ⋅258551.

It is a cyclic number.

It is not a de Polignac number, because 152442181 - 2²¹ = 150345029 is a prime.

It is a super-2 number, since 2×152442181² = 46477237096073522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152442161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772541 + ... + 1772626.

It is an arithmetic number, because the mean of its divisors is an integer number (38996848).

Almost surely, 2^152442181 is an apocalyptic number.

It is an amenable number.

152442181 is a deficient number, since it is larger than the sum of its proper divisors (3545211).

152442181 is an equidigital number, since it uses as much as digits as its factorization.

152442181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545210.

The product of its digits is 2560, while the sum is 28.

The square root of 152442181 is about 12346.7477904102. The cubic root of 152442181 is about 534.1973359706.

The spelling of 152442181 in words is "one hundred fifty-two million, four hundred forty-two thousand, one hundred eighty-one".