51931498 has 16 divisors (see below), whose sum is σ = 84710664. Its totient is φ = 23777280.

The previous prime is 51931483. The next prime is 51931501. The reversal of 51931498 is 89413915.

It can be written as a sum of positive squares in 4 ways, for example, as 51796809 + 134689 = 7197^2 + 367^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51931498.

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, 19383 + ... + 21898.

Almost surely, 2^51931498 is an apocalyptic number.

51931498 is a deficient number, since it is larger than the sum of its proper divisors (32779166).

51931498 is a wasteful number, since it uses less digits than its factorization.

51931498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41337.

The product of its digits is 38880, while the sum is 40.

The square root of 51931498 is about 7206.3512265223. The cubic root of 51931498 is about 373.0871433506.

The spelling of 51931498 in words is "fifty-one million, nine hundred thirty-one thousand, four hundred ninety-eight".