51521198 has 12 divisors (see below), whose sum is σ = 81564480. Its totient is φ = 24404436.

The previous prime is 51521189. The next prime is 51521201. The reversal of 51521198 is 89112515.

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, 34958 + ... + 36401.

It is an arithmetic number, because the mean of its divisors is an integer number (6797040).

Almost surely, 2^51521198 is an apocalyptic number.

51521198 is a deficient number, since it is larger than the sum of its proper divisors (30043282).

51521198 is a wasteful number, since it uses less digits than its factorization.

51521198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71399 (or 71380 counting only the distinct ones).

The product of its digits is 3600, while the sum is 32.

The square root of 51521198 is about 7177.8268298978. The cubic root of 51521198 is about 372.1019828689.

The spelling of 51521198 in words is "fifty-one million, five hundred twenty-one thousand, one hundred ninety-eight".