51331023 has 16 divisors (see below), whose sum is σ = 76606560. Its totient is φ = 33968448.

The previous prime is 51331019. The next prime is 51331051. The reversal of 51331023 is 32013315.

It is not a de Polignac number, because 51331023 - 2² = 51331019 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 51330987 and 51331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51331013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3240 + ... + 10637.

It is an arithmetic number, because the mean of its divisors is an integer number (4787910).

Almost surely, 2^51331023 is an apocalyptic number.

51331023 is a deficient number, since it is larger than the sum of its proper divisors (25275537).

51331023 is a wasteful number, since it uses less digits than its factorization.

51331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023 (or 14017 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51331023 is about 7164.5671886025. The cubic root of 51331023 is about 371.6435842230.

Adding to 51331023 its reverse (32013315), we get a palindrome (83344338).

The spelling of 51331023 in words is "fifty-one million, three hundred thirty-one thousand, twenty-three".