51524861 has 2 divisors, whose sum is σ = 51524862. Its totient is φ = 51524860.

The previous prime is 51524857. The next prime is 51524917. The reversal of 51524861 is 16842515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 11519236 = 6325^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 51524861 - 2² = 51524857 is a prime.

It is a super-2 number, since 2×51524861² = 5309622602138642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51524801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25762430 + 25762431.

It is an arithmetic number, because the mean of its divisors is an integer number (25762431).

Almost surely, 2^51524861 is an apocalyptic number.

It is an amenable number.

51524861 is a deficient number, since it is larger than the sum of its proper divisors (1).

51524861 is an equidigital number, since it uses as much as digits as its factorization.

51524861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 32.

The square root of 51524861 is about 7178.0819861576. The cubic root of 51524861 is about 372.1108010985.

The spelling of 51524861 in words is "fifty-one million, five hundred twenty-four thousand, eight hundred sixty-one".