51912969 has 8 divisors (see below), whose sum is σ = 69399552. Its totient is φ = 34517520.

The previous prime is 51912967. The next prime is 51912977. The reversal of 51912969 is 96921915.

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 51912969 - 2¹ = 51912967 is a prime.

It is a super-2 number, since 2×51912969² = 5389912700789922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51912969.

It is not an unprimeable number, because it can be changed into a prime (51912967) 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, 21442 + ... + 23739.

It is an arithmetic number, because the mean of its divisors is an integer number (8674944).

Almost surely, 2^51912969 is an apocalyptic number.

It is an amenable number.

51912969 is a deficient number, since it is larger than the sum of its proper divisors (17486583).

51912969 is a wasteful number, since it uses less digits than its factorization.

51912969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45567.

The product of its digits is 43740, while the sum is 42.

The square root of 51912969 is about 7205.0655097646. The cubic root of 51912969 is about 373.0427659543.

The spelling of 51912969 in words is "fifty-one million, nine hundred twelve thousand, nine hundred sixty-nine".