51432031 has 12 divisors (see below), whose sum is σ = 62038992. Its totient is φ = 41762304.

The previous prime is 51432023. The next prime is 51432047. The reversal of 51432031 is 13023415.

51432031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51432031 - 2³ = 51432023 is a prime.

It is a super-2 number, since 2×51432031² = 5290507625569922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51432001) 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 11 ways as a sum of consecutive naturals, for example, 7650 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (5169916).

Almost surely, 2^51432031 is an apocalyptic number.

51432031 is a deficient number, since it is larger than the sum of its proper divisors (10606961).

51432031 is a wasteful number, since it uses less digits than its factorization.

51432031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20398 (or 20379 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 51432031 is about 7171.6128590436. The cubic root of 51432031 is about 371.8871950524.

Adding to 51432031 its reverse (13023415), we get a palindrome (64455446).

The spelling of 51432031 in words is "fifty-one million, four hundred thirty-two thousand, thirty-one".