51903161 has 2 divisors, whose sum is σ = 51903162. Its totient is φ = 51903160.

The previous prime is 51903149. The next prime is 51903169. The reversal of 51903161 is 16130915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51566761 + 336400 = 7181^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 51903161 - 2⁶ = 51903097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51903161.

It is not a weakly prime, because it can be changed into another prime (51903169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25951580 + 25951581.

It is an arithmetic number, because the mean of its divisors is an integer number (25951581).

Almost surely, 2^51903161 is an apocalyptic number.

It is an amenable number.

51903161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51903161 is an equidigital number, since it uses as much as digits as its factorization.

51903161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 51903161 is about 7204.3848453563. The cubic root of 51903161 is about 373.0192712864.

The spelling of 51903161 in words is "fifty-one million, nine hundred three thousand, one hundred sixty-one".