65228931 has 24 divisors (see below), whose sum is σ = 96554016. Its totient is φ = 42422400.

The previous prime is 65228923. The next prime is 65228939. The reversal of 65228931 is 13982256.

It is an interprime number because it is at equal distance from previous prime (65228923) and next prime (65228939).

It is not a de Polignac number, because 65228931 - 2³ = 65228923 is a prime.

It is a super-2 number, since 2×65228931² = 8509626878805522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65228939) 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, 65866 + ... + 66848.

It is an arithmetic number, because the mean of its divisors is an integer number (4023084).

Almost surely, 2^65228931 is an apocalyptic number.

65228931 is a deficient number, since it is larger than the sum of its proper divisors (31325085).

65228931 is a wasteful number, since it uses less digits than its factorization.

65228931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1160 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 65228931 is about 8076.4429670493. The cubic root of 65228931 is about 402.5440580348.

The spelling of 65228931 in words is "sixty-five million, two hundred twenty-eight thousand, nine hundred thirty-one".