64131276 has 48 divisors (see below), whose sum is σ = 172851840. Its totient is φ = 18289920.

The previous prime is 64131269. The next prime is 64131283. The reversal of 64131276 is 67213146.

It is an interprime number because it is at equal distance from previous prime (64131269) and next prime (64131283).

It is a super-2 number, since 2×64131276² = 8225641122776352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12046 + ... + 16533.

It is an arithmetic number, because the mean of its divisors is an integer number (3601080).

Almost surely, 2^64131276 is an apocalyptic number.

64131276 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64131276 is an abundant number, since it is smaller than the sum of its proper divisors (108720564).

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

64131276 is a wasteful number, since it uses less digits than its factorization.

64131276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614 (or 28612 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 64131276 is about 8008.2005469394. The cubic root of 64131276 is about 400.2733048852.

The spelling of 64131276 in words is "sixty-four million, one hundred thirty-one thousand, two hundred seventy-six".