51774997 has 2 divisors, whose sum is σ = 51774998. Its totient is φ = 51774996.

The previous prime is 51774973. The next prime is 51775027. The reversal of 51774997 is 79947715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 64516 = 7191^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 51774997 - 2¹¹ = 51772949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51774997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51774397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25887498 + 25887499.

It is an arithmetic number, because the mean of its divisors is an integer number (25887499).

Almost surely, 2^51774997 is an apocalyptic number.

It is an amenable number.

51774997 is a deficient number, since it is larger than the sum of its proper divisors (1).

51774997 is an equidigital number, since it uses as much as digits as its factorization.

51774997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 555660, while the sum is 49.

The square root of 51774997 is about 7195.4844868153. The cubic root of 51774997 is about 372.7119871997.

The spelling of 51774997 in words is "fifty-one million, seven hundred seventy-four thousand, nine hundred ninety-seven".