253145644 has 24 divisors (see below), whose sum is σ = 464376528. Its totient is φ = 120610560.

The previous prime is 253145639. The next prime is 253145647. The reversal of 253145644 is 446541352.

253145644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (253145647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10897 + ... + 25000.

It is an arithmetic number, because the mean of its divisors is an integer number (19349022).

Almost surely, 2^253145644 is an apocalyptic number.

It is an amenable number.

253145644 is a deficient number, since it is larger than the sum of its proper divisors (211230884).

253145644 is a wasteful number, since it uses less digits than its factorization.

253145644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35985 (or 35983 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 253145644 is about 15910.5513417983. The cubic root of 253145644 is about 632.5916953720.

Adding to 253145644 its reverse (446541352), we get a palindrome (699686996).

The spelling of 253145644 in words is "two hundred fifty-three million, one hundred forty-five thousand, six hundred forty-four".