51711388 has 24 divisors (see below), whose sum is σ = 96163200. Its totient is φ = 24262128.

The previous prime is 51711367. The next prime is 51711391. The reversal of 51711388 is 88311715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4953 + ... + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (4006800).

Almost surely, 2^51711388 is an apocalyptic number.

It is an amenable number.

51711388 is a deficient number, since it is larger than the sum of its proper divisors (44451812).

51711388 is a wasteful number, since it uses less digits than its factorization.

51711388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489 (or 6487 counting only the distinct ones).

The product of its digits is 6720, while the sum is 34.

The square root of 51711388 is about 7191.0630646658. The cubic root of 51711388 is about 372.5592908940.

It can be divided in two parts, 517 and 11388, that multiplied together give a triangular number (5887596 = T₃₄₃₁).

The spelling of 51711388 in words is "fifty-one million, seven hundred eleven thousand, three hundred eighty-eight".