64965231 has 12 divisors (see below), whose sum is σ = 94207152. Its totient is φ = 43140096.

The previous prime is 64965221. The next prime is 64965247. The reversal of 64965231 is 13256946.

It is a happy number.

64965231 is a `hidden beast` number, since 649 + 6 + 5 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 64965231 - 2⁶ = 64965167 is a prime.

It is a super-2 number, since 2×64965231² = 8440962477766722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64965221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11731 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (7850596).

Almost surely, 2^64965231 is an apocalyptic number.

64965231 is a deficient number, since it is larger than the sum of its proper divisors (29241921).

64965231 is a wasteful number, since it uses less digits than its factorization.

64965231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28350 (or 28347 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 64965231 is about 8060.1011780250. The cubic root of 64965231 is about 402.0008725013. Note that the first 3 decimals are identical.

The spelling of 64965231 in words is "sixty-four million, nine hundred sixty-five thousand, two hundred thirty-one".