51816488 has 16 divisors (see below), whose sum is σ = 97375380. Its totient is φ = 25849728.

The previous prime is 51816467. The next prime is 51816547. The reversal of 51816488 is 88461815.

It can be written as a sum of positive squares in 2 ways, for example, as 43533604 + 8282884 = 6598^2 + 2878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3431 + ... + 10742.

Almost surely, 2^51816488 is an apocalyptic number.

It is an amenable number.

51816488 is a deficient number, since it is larger than the sum of its proper divisors (45558892).

51816488 is a wasteful number, since it uses less digits than its factorization.

51816488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14636 (or 14632 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 51816488 is about 7198.3670370439. The cubic root of 51816488 is about 372.8115208545.

The spelling of 51816488 in words is "fifty-one million, eight hundred sixteen thousand, four hundred eighty-eight".