51131769 has 16 divisors (see below), whose sum is σ = 74112192. Its totient is φ = 31169088.

The previous prime is 51131761. The next prime is 51131777. The reversal of 51131769 is 96713115.

It is a happy number.

51131769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51131761) and next prime (51131777).

It is not a de Polignac number, because 51131769 - 2³ = 51131761 is a prime.

It is a super-2 number, since 2×51131769² = 5228915602138722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51131761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1954 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (4632012).

Almost surely, 2^51131769 is an apocalyptic number.

It is an amenable number.

51131769 is a deficient number, since it is larger than the sum of its proper divisors (22980423).

51131769 is a wasteful number, since it uses less digits than its factorization.

51131769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12376.

The product of its digits is 5670, while the sum is 33.

The square root of 51131769 is about 7150.6481524404. The cubic root of 51131769 is about 371.1620853171.

The spelling of 51131769 in words is "fifty-one million, one hundred thirty-one thousand, seven hundred sixty-nine".