51775697 has 2 divisors, whose sum is σ = 51775698. Its totient is φ = 51775696.

The previous prime is 51775681. The next prime is 51775709. The reversal of 51775697 is 79657715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43573201 + 8202496 = 6601^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 51775697 - 2⁴ = 51775681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51775637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25887848 + 25887849.

It is an arithmetic number, because the mean of its divisors is an integer number (25887849).

Almost surely, 2^51775697 is an apocalyptic number.

It is an amenable number.

51775697 is a deficient number, since it is larger than the sum of its proper divisors (1).

51775697 is an equidigital number, since it uses as much as digits as its factorization.

51775697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 463050, while the sum is 47.

The square root of 51775697 is about 7195.5331282678. The cubic root of 51775697 is about 372.7136668857.

The spelling of 51775697 in words is "fifty-one million, seven hundred seventy-five thousand, six hundred ninety-seven".