51513601 has 2 divisors, whose sum is σ = 51513602. Its totient is φ = 51513600.

The previous prime is 51513593. The next prime is 51513611. The reversal of 51513601 is 10631515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 15992001 = 5960^2 + 3999^2 .

It is a cyclic number.

It is not a de Polignac number, because 51513601 - 2³ = 51513593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51513611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756800 + 25756801.

It is an arithmetic number, because the mean of its divisors is an integer number (25756801).

Almost surely, 2^51513601 is an apocalyptic number.

It is an amenable number.

51513601 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513601 is an equidigital number, since it uses as much as digits as its factorization.

51513601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51513601 is about 7177.2976112183. The cubic root of 51513601 is about 372.0836926775.

The spelling of 51513601 in words is "fifty-one million, five hundred thirteen thousand, six hundred one".