51371331 has 16 divisors (see below), whose sum is σ = 79118208. Its totient is φ = 29302400.

The previous prime is 51371323. The next prime is 51371339. The reversal of 51371331 is 13317315.

It is an interprime number because it is at equal distance from previous prime (51371323) and next prime (51371339).

It is a cyclic number.

It is not a de Polignac number, because 51371331 - 2³ = 51371323 is a prime.

It is a super-2 number, since 2×51371331² = 5278027297423122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51371339) 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, 45225 + ... + 46346.

It is an arithmetic number, because the mean of its divisors is an integer number (4944888).

Almost surely, 2^51371331 is an apocalyptic number.

51371331 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51371331 is a deficient number, since it is larger than the sum of its proper divisors (27746877).

51371331 is a wasteful number, since it uses less digits than its factorization.

51371331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91602.

The product of its digits is 945, while the sum is 24.

The square root of 51371331 is about 7167.3796467049. The cubic root of 51371331 is about 371.7408372377.

Adding to 51371331 its reverse (13317315), we get a palindrome (64688646).

The spelling of 51371331 in words is "fifty-one million, three hundred seventy-one thousand, three hundred thirty-one".