51651315 has 24 divisors (see below), whose sum is σ = 90614160. Its totient is φ = 27213504.

The previous prime is 51651289. The next prime is 51651337. The reversal of 51651315 is 51315615.

51651315 is a `hidden beast` number, since 5 + 1 + 651 + 3 + 1 + 5 = 666.

It is not a de Polignac number, because 51651315 - 2⁶ = 51651251 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3180 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (3775590).

Almost surely, 2^51651315 is an apocalyptic number.

51651315 is a deficient number, since it is larger than the sum of its proper divisors (38962845).

51651315 is a wasteful number, since it uses less digits than its factorization.

51651315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923 (or 13920 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 51651315 is about 7186.8849302045. The cubic root of 51651315 is about 372.4149679037.

The spelling of 51651315 in words is "fifty-one million, six hundred fifty-one thousand, three hundred fifteen".