51671872 has 42 divisors (see below), whose sum is σ = 119284242. Its totient is φ = 22143744.

The previous prime is 51671839. The next prime is 51671911. The reversal of 51671872 is 27817615.

It can be written as a sum of positive squares in only one way, i.e., 40755456 + 10916416 = 6384^2 + 3304^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5103 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (2840101).

Almost surely, 2^51671872 is an apocalyptic number.

It is an amenable number.

51671872 is an abundant number, since it is smaller than the sum of its proper divisors (67612370).

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

51671872 is a wasteful number, since it uses less digits than its factorization.

51671872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16503 (or 16486 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 51671872 is about 7188.3149624929. The cubic root of 51671872 is about 372.4643678662.

The spelling of 51671872 in words is "fifty-one million, six hundred seventy-one thousand, eight hundred seventy-two".