51513377 has 2 divisors, whose sum is σ = 51513378. Its totient is φ = 51513376.

The previous prime is 51513373. The next prime is 51513391. The reversal of 51513377 is 77331515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 8532241 = 6556^2 + 2921^2 .

It is a cyclic number.

It is not a de Polignac number, because 51513377 - 2² = 51513373 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51513373) 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, 25756688 + 25756689.

It is an arithmetic number, because the mean of its divisors is an integer number (25756689).

Almost surely, 2^51513377 is an apocalyptic number.

It is an amenable number.

51513377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513377 is an equidigital number, since it uses as much as digits as its factorization.

51513377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11025, while the sum is 32.

The square root of 51513377 is about 7177.2820064423. The cubic root of 51513377 is about 372.0831533580.

The spelling of 51513377 in words is "fifty-one million, five hundred thirteen thousand, three hundred seventy-seven".