253431616 has 14 divisors (see below), whose sum is σ = 502903490. Its totient is φ = 126715776.

The previous prime is 253431613. The next prime is 253431623. The reversal of 253431616 is 616134352.

It can be written as a sum of positive squares in only one way, i.e., 197121600 + 56310016 = 14040^2 + 7504^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253431613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979871 + ... + 1979998.

Almost surely, 2^253431616 is an apocalyptic number.

It is an amenable number.

253431616 is a deficient number, since it is larger than the sum of its proper divisors (249471874).

253431616 is an equidigital number, since it uses as much as digits as its factorization.

253431616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959881 (or 3959871 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 253431616 is about 15919.5356716206. The cubic root of 253431616 is about 632.8298131495.

Adding to 253431616 its reverse (616134352), we get a palindrome (869565968).

The spelling of 253431616 in words is "two hundred fifty-three million, four hundred thirty-one thousand, six hundred sixteen".