253906731 has 20 divisors (see below), whose sum is σ = 408470832. Its totient is φ = 156249648.

The previous prime is 253906717. The next prime is 253906777. The reversal of 253906731 is 137609352.

It is not a de Polignac number, because 253906731 - 2⁷ = 253906603 is a prime.

It is a super-2 number, since 2×253906731² = 128937256094212722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253976731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119511 + ... + 121616.

Almost surely, 2^253906731 is an apocalyptic number.

253906731 is a deficient number, since it is larger than the sum of its proper divisors (154564101).

253906731 is a wasteful number, since it uses less digits than its factorization.

253906731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241152 (or 241143 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 253906731 is about 15934.4510730681. The cubic root of 253906731 is about 633.2250272476.

The spelling of 253906731 in words is "two hundred fifty-three million, nine hundred six thousand, seven hundred thirty-one".