51816315 has 8 divisors (see below), whose sum is σ = 82906128. Its totient is φ = 27635360.

The previous prime is 51816257. The next prime is 51816329. The reversal of 51816315 is 51361815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51816315 - 2¹⁷ = 51685243 is a prime.

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, 1727196 + ... + 1727225.

It is an arithmetic number, because the mean of its divisors is an integer number (10363266).

Almost surely, 2^51816315 is an apocalyptic number.

51816315 is a deficient number, since it is larger than the sum of its proper divisors (31089813).

51816315 is a wasteful number, since it uses less digits than its factorization.

51816315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454429.

The product of its digits is 3600, while the sum is 30.

The square root of 51816315 is about 7198.3550204196. The cubic root of 51816315 is about 372.8111059514.

The spelling of 51816315 in words is "fifty-one million, eight hundred sixteen thousand, three hundred fifteen".