51631769 has 8 divisors (see below), whose sum is σ = 59064000. Its totient is φ = 44213616.

The previous prime is 51631763. The next prime is 51631781. The reversal of 51631769 is 96713615.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51631769 is a prime.

It is a super-2 number, since 2×51631769² = 5331679140138722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51631763) 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, 6107 + ... + 11855.

It is an arithmetic number, because the mean of its divisors is an integer number (7383000).

Almost surely, 2^51631769 is an apocalyptic number.

It is an amenable number.

51631769 is a deficient number, since it is larger than the sum of its proper divisors (7432231).

51631769 is a wasteful number, since it uses less digits than its factorization.

51631769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039.

The product of its digits is 34020, while the sum is 38.

The square root of 51631769 is about 7185.5249634247. The cubic root of 51631769 is about 372.3679852899.

The spelling of 51631769 in words is "fifty-one million, six hundred thirty-one thousand, seven hundred sixty-nine".