51331401 has 40 divisors (see below), whose sum is σ = 85307904. Its totient is φ = 30494880.

The previous prime is 51331391. The next prime is 51331411. The reversal of 51331401 is 10413315.

It is an interprime number because it is at equal distance from previous prime (51331391) and next prime (51331411).

It is not a de Polignac number, because 51331401 - 2⁹ = 51330889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51331411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46680 + ... + 47766.

Almost surely, 2^51331401 is an apocalyptic number.

It is an amenable number.

51331401 is a deficient number, since it is larger than the sum of its proper divisors (33976503).

51331401 is a wasteful number, since it uses less digits than its factorization.

51331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 51331401 is about 7164.5935683750. The cubic root of 51331401 is about 371.6444964779.

Adding to 51331401 its reverse (10413315), we get a palindrome (61744716).

The spelling of 51331401 in words is "fifty-one million, three hundred thirty-one thousand, four hundred one".