51895564 has 24 divisors (see below), whose sum is σ = 103943840. Its totient is φ = 22208256.

The previous prime is 51895561. The next prime is 51895573. The reversal of 51895564 is 46559815.

It is a self number, because there is not a number n which added to its sum of digits gives 51895564.

It is not an unprimeable number, because it can be changed into a prime (51895561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35602 + ... + 37030.

Almost surely, 2^51895564 is an apocalyptic number.

It is an amenable number.

51895564 is an abundant number, since it is smaller than the sum of its proper divisors (52048276).

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

51895564 is a wasteful number, since it uses less digits than its factorization.

51895564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737 (or 2735 counting only the distinct ones).

The product of its digits is 216000, while the sum is 43.

The square root of 51895564 is about 7203.8575777149. The cubic root of 51895564 is about 373.0010709455.

The spelling of 51895564 in words is "fifty-one million, eight hundred ninety-five thousand, five hundred sixty-four".