51023815 has 8 divisors (see below), whose sum is σ = 61277328. Its totient is φ = 40786560.

The previous prime is 51023773. The next prime is 51023827. The reversal of 51023815 is 51832015.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-51023815 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51023815.

It is a congruent number.

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, 4480 + ... + 11050.

It is an arithmetic number, because the mean of its divisors is an integer number (7659666).

Almost surely, 2^51023815 is an apocalyptic number.

51023815 is a deficient number, since it is larger than the sum of its proper divisors (10253513).

51023815 is a wasteful number, since it uses less digits than its factorization.

51023815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 51023815 is about 7143.0956174477. The cubic root of 51023815 is about 370.9006909866.

The spelling of 51023815 in words is "fifty-one million, twenty-three thousand, eight hundred fifteen".