51279769 has 8 divisors (see below), whose sum is σ = 54984960. Its totient is φ = 47651136.

The previous prime is 51279737. The next prime is 51279827. The reversal of 51279769 is 96797215.

It is a happy number.

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

It is not a de Polignac number, because 51279769 - 2⁵ = 51279737 is a prime.

It is a super-2 number, since 2×51279769² = 5259229417386722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51279169) 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, 17749 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (6873120).

Almost surely, 2^51279769 is an apocalyptic number.

It is an amenable number.

51279769 is a deficient number, since it is larger than the sum of its proper divisors (3705191).

51279769 is a wasteful number, since it uses less digits than its factorization.

51279769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38279.

The product of its digits is 238140, while the sum is 46.

The square root of 51279769 is about 7160.9893869493. The cubic root of 51279769 is about 371.5198477211.

The spelling of 51279769 in words is "fifty-one million, two hundred seventy-nine thousand, seven hundred sixty-nine".