51915379 has 4 divisors (see below), whose sum is σ = 51931584. Its totient is φ = 51899176.

The previous prime is 51915377. The next prime is 51915427. The reversal of 51915379 is 97351915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51915379 - 2¹ = 51915377 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51915373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507 + ... + 10300.

It is an arithmetic number, because the mean of its divisors is an integer number (12982896).

Almost surely, 2^51915379 is an apocalyptic number.

51915379 is a deficient number, since it is larger than the sum of its proper divisors (16205).

51915379 is a wasteful number, since it uses less digits than its factorization.

51915379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204.

The product of its digits is 42525, while the sum is 40.

The square root of 51915379 is about 7205.2327512718. The cubic root of 51915379 is about 373.0485385590.

The spelling of 51915379 in words is "fifty-one million, nine hundred fifteen thousand, three hundred seventy-nine".