51618715 has 16 divisors (see below), whose sum is σ = 65784960. Its totient is φ = 38748160.

The previous prime is 51618703. The next prime is 51618719. The reversal of 51618715 is 51781615.

It is not a de Polignac number, because 51618715 - 2¹¹ = 51616667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51618719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35931 + ... + 37339.

It is an arithmetic number, because the mean of its divisors is an integer number (4111560).

Almost surely, 2^51618715 is an apocalyptic number.

51618715 is a deficient number, since it is larger than the sum of its proper divisors (14166245).

51618715 is a wasteful number, since it uses less digits than its factorization.

51618715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862.

The product of its digits is 8400, while the sum is 34.

The square root of 51618715 is about 7184.6165520506. The cubic root of 51618715 is about 372.3366008568.

The spelling of 51618715 in words is "fifty-one million, six hundred eighteen thousand, seven hundred fifteen".