51574681 has 2 divisors, whose sum is σ = 51574682. Its totient is φ = 51574680.

The previous prime is 51574661. The next prime is 51574687. The reversal of 51574681 is 18647515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34633225 + 16941456 = 5885^2 + 4116^2 .

It is a cyclic number.

It is not a de Polignac number, because 51574681 - 2⁷ = 51574553 is a prime.

It is a super-2 number, since 2×51574681² = 5319895440503522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51574681.

It is not a weakly prime, because it can be changed into another prime (51574687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25787340 + 25787341.

It is an arithmetic number, because the mean of its divisors is an integer number (25787341).

Almost surely, 2^51574681 is an apocalyptic number.

It is an amenable number.

51574681 is a deficient number, since it is larger than the sum of its proper divisors (1).

51574681 is an equidigital number, since it uses as much as digits as its factorization.

51574681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 37.

The square root of 51574681 is about 7181.5514340566. The cubic root of 51574681 is about 372.2306952487.

The spelling of 51574681 in words is "fifty-one million, five hundred seventy-four thousand, six hundred eighty-one".