51132789 has 14 divisors (see below), whose sum is σ = 76665206. Its totient is φ = 34088040.

The previous prime is 51132769. The next prime is 51132791. The reversal of 51132789 is 98723115.

51132789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 47032164 + 4100625 = 6858^2 + 2025^2 .

It is not a de Polignac number, because 51132789 - 2⁷ = 51132661 is a prime.

It is a super-2 number, since 2×51132789² = 5229124221837042, 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 (51132769) 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 13 ways as a sum of consecutive naturals, for example, 34342 + ... + 35799.

Almost surely, 2^51132789 is an apocalyptic number.

It is an amenable number.

51132789 is a deficient number, since it is larger than the sum of its proper divisors (25532417).

51132789 is an frugal number, since it uses more digits than its factorization.

51132789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70159 (or 70144 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51132789 is about 7150.7194742907. The cubic root of 51132789 is about 371.1645533379.

The spelling of 51132789 in words is "fifty-one million, one hundred thirty-two thousand, seven hundred eighty-nine".