51479507 has 4 divisors (see below), whose sum is σ = 51533496. Its totient is φ = 51425520.

The previous prime is 51479453. The next prime is 51479513. The reversal of 51479507 is 70597415.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51479507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51479707) 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, 25538 + ... + 27479.

It is an arithmetic number, because the mean of its divisors is an integer number (12883374).

Almost surely, 2^51479507 is an apocalyptic number.

51479507 is a deficient number, since it is larger than the sum of its proper divisors (53989).

51479507 is an equidigital number, since it uses as much as digits as its factorization.

51479507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53988.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 51479507 is about 7174.9220901693. The cubic root of 51479507 is about 372.0015873636.

The spelling of 51479507 in words is "fifty-one million, four hundred seventy-nine thousand, five hundred seven".