51590401 has 2 divisors, whose sum is σ = 51590402. Its totient is φ = 51590400.

The previous prime is 51590387. The next prime is 51590431. The reversal of 51590401 is 10409515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38738176 + 12852225 = 6224^2 + 3585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51590401 is a prime.

It is equal to p_3090760 and since 51590401 and 3090760 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51590431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25795200 + 25795201.

It is an arithmetic number, because the mean of its divisors is an integer number (25795201).

Almost surely, 2^51590401 is an apocalyptic number.

It is an amenable number.

51590401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51590401 is an equidigital number, since it uses as much as digits as its factorization.

51590401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51590401 is about 7182.6458217011. The cubic root of 51590401 is about 372.2685101351.

Adding to 51590401 its reverse (10409515), we get a palindrome (61999916).

The spelling of 51590401 in words is "fifty-one million, five hundred ninety thousand, four hundred one".