51279479 has 8 divisors (see below), whose sum is σ = 52678080. Its totient is φ = 49888000.

The previous prime is 51279469. The next prime is 51279509. The reversal of 51279479 is 97497215.

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

It is a cyclic number.

It is not a de Polignac number, because 51279479 - 2²⁴ = 34502263 is a prime.

It is a super-2 number, since 2×51279479² = 5259169933022882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51279419) 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, 14882 + ... + 18000.

It is an arithmetic number, because the mean of its divisors is an integer number (6584760).

Almost surely, 2^51279479 is an apocalyptic number.

51279479 is a deficient number, since it is larger than the sum of its proper divisors (1398601).

51279479 is a wasteful number, since it uses less digits than its factorization.

51279479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561.

The product of its digits is 158760, while the sum is 44.

The square root of 51279479 is about 7160.9691383220. The cubic root of 51279479 is about 371.5191473737.

The spelling of 51279479 in words is "fifty-one million, two hundred seventy-nine thousand, four hundred seventy-nine".