51187715 has 8 divisors (see below), whose sum is σ = 61570368. Its totient is φ = 40853440.

The previous prime is 51187711. The next prime is 51187739. The reversal of 51187715 is 51778115.

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

It is not a de Polignac number, because 51187715 - 2² = 51187711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51187711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9722 + ... + 14031.

It is an arithmetic number, because the mean of its divisors is an integer number (7696296).

Almost surely, 2^51187715 is an apocalyptic number.

51187715 is a deficient number, since it is larger than the sum of its proper divisors (10382653).

51187715 is a wasteful number, since it uses less digits than its factorization.

51187715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24189.

The product of its digits is 9800, while the sum is 35.

The square root of 51187715 is about 7154.5590360273. The cubic root of 51187715 is about 371.2974053973.

The spelling of 51187715 in words is "fifty-one million, one hundred eighty-seven thousand, seven hundred fifteen".