51610961 has 2 divisors, whose sum is σ = 51610962. Its totient is φ = 51610960.

The previous prime is 51610943. The next prime is 51610969. The reversal of 51610961 is 16901615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26460736 + 25150225 = 5144^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 51610961 - 2²² = 47416657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51610969) 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 as a sum of consecutive naturals, namely, 25805480 + 25805481.

It is an arithmetic number, because the mean of its divisors is an integer number (25805481).

Almost surely, 2^51610961 is an apocalyptic number.

It is an amenable number.

51610961 is a deficient number, since it is larger than the sum of its proper divisors (1).

51610961 is an equidigital number, since it uses as much as digits as its factorization.

51610961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 51610961 is about 7184.0769066039. The cubic root of 51610961 is about 372.3179561813.

The spelling of 51610961 in words is "fifty-one million, six hundred ten thousand, nine hundred sixty-one".