253203531 has 24 divisors (see below), whose sum is σ = 394421760. Its totient is φ = 144062352.

The previous prime is 253203521. The next prime is 253203547. The reversal of 253203531 is 135302352.

It is a happy number.

It is not a de Polignac number, because 253203531 - 2⁵ = 253203499 is a prime.

It is a super-2 number, since 2×253203531² = 128224056221735922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253203521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31530 + ... + 38736.

It is an arithmetic number, because the mean of its divisors is an integer number (16434240).

Almost surely, 2^253203531 is an apocalyptic number.

253203531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

253203531 is a deficient number, since it is larger than the sum of its proper divisors (141218229).

253203531 is a wasteful number, since it uses less digits than its factorization.

253203531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7463 (or 7456 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 253203531 is about 15912.3703765341. The cubic root of 253203531 is about 632.6399100993.

Adding to 253203531 its reverse (135302352), we get a palindrome (388505883).

The spelling of 253203531 in words is "two hundred fifty-three million, two hundred three thousand, five hundred thirty-one".