253231434 has 20 divisors (see below), whose sum is σ = 567426354. Its totient is φ = 84410424.

The previous prime is 253231417. The next prime is 253231453. The reversal of 253231434 is 434132352.

It can be written as a sum of positive squares in only one way, i.e., 166797225 + 86434209 = 12915^2 + 9297^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 253231398 and 253231407.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 781417 + ... + 781740.

Almost surely, 2^253231434 is an apocalyptic number.

253231434 is an abundant number, since it is smaller than the sum of its proper divisors (314194920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253231434 is a wasteful number, since it uses less digits than its factorization.

253231434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563171 (or 1563162 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 253231434 is about 15913.2471230733. The cubic root of 253231434 is about 632.6631481942.

Adding to 253231434 its reverse (434132352), we get a palindrome (687363786).

The spelling of 253231434 in words is "two hundred fifty-three million, two hundred thirty-one thousand, four hundred thirty-four".