51694988 has 12 divisors (see below), whose sum is σ = 90701520. Its totient is φ = 25780272.

The previous prime is 51694939. The next prime is 51694997. The reversal of 51694988 is 88949615.

It is a happy number.

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, 15056 + ... + 18167.

It is an arithmetic number, because the mean of its divisors is an integer number (7558460).

Almost surely, 2^51694988 is an apocalyptic number.

It is an amenable number.

51694988 is a deficient number, since it is larger than the sum of its proper divisors (39006532).

51694988 is a wasteful number, since it uses less digits than its factorization.

51694988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33616 (or 33614 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 51694988 is about 7189.9226699597. The cubic root of 51694988 is about 372.5199016438.

The spelling of 51694988 in words is "fifty-one million, six hundred ninety-four thousand, nine hundred eighty-eight".