51951579 has 4 divisors (see below), whose sum is σ = 69268776. Its totient is φ = 34634384.

The previous prime is 51951569. The next prime is 51951593. The reversal of 51951579 is 97515915.

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 51951579 - 2⁴ = 51951563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51951579.

It is not an unprimeable number, because it can be changed into a prime (51951539) 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, 8658594 + ... + 8658599.

It is an arithmetic number, because the mean of its divisors is an integer number (17317194).

Almost surely, 2^51951579 is an apocalyptic number.

51951579 is a deficient number, since it is larger than the sum of its proper divisors (17317197).

51951579 is a wasteful number, since it uses less digits than its factorization.

51951579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17317196.

The product of its digits is 70875, while the sum is 42.

The square root of 51951579 is about 7207.7443767104. The cubic root of 51951579 is about 373.1352259065.

The spelling of 51951579 in words is "fifty-one million, nine hundred fifty-one thousand, five hundred seventy-nine".