253442536 has 8 divisors (see below), whose sum is σ = 475204770. Its totient is φ = 126721264.

The previous prime is 253442509. The next prime is 253442557. The reversal of 253442536 is 635244352.

It can be written as a sum of positive squares in only one way, i.e., 224820036 + 28622500 = 14994^2 + 5350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×253442536² = 128466238108222592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15840151 + ... + 15840166.

Almost surely, 2^253442536 is an apocalyptic number.

It is an amenable number.

253442536 is a deficient number, since it is larger than the sum of its proper divisors (221762234).

253442536 is a wasteful number, since it uses less digits than its factorization.

253442536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31680323 (or 31680319 counting only the distinct ones).

The product of its digits is 86400, while the sum is 34.

The square root of 253442536 is about 15919.8786427535. The cubic root of 253442536 is about 632.8389022579.

Adding to 253442536 its reverse (635244352), we get a palindrome (888686888).

The spelling of 253442536 in words is "two hundred fifty-three million, four hundred forty-two thousand, five hundred thirty-six".