51695173 has 2 divisors, whose sum is σ = 51695174. Its totient is φ = 51695172.

The previous prime is 51695167. The next prime is 51695177. The reversal of 51695173 is 37159615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44116164 + 7579009 = 6642^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 51695173 - 2⁵ = 51695141 is a prime.

It is a super-2 number, since 2×51695173² = 5344781822999858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51695177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25847586 + 25847587.

It is an arithmetic number, because the mean of its divisors is an integer number (25847587).

Almost surely, 2^51695173 is an apocalyptic number.

It is an amenable number.

51695173 is a deficient number, since it is larger than the sum of its proper divisors (1).

51695173 is an equidigital number, since it uses as much as digits as its factorization.

51695173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 37.

The square root of 51695173 is about 7189.9355351769. The cubic root of 51695173 is about 372.5203460202.

The spelling of 51695173 in words is "fifty-one million, six hundred ninety-five thousand, one hundred seventy-three".