51522787 has 2 divisors, whose sum is σ = 51522788. Its totient is φ = 51522786.

The previous prime is 51522781. The next prime is 51522797. The reversal of 51522787 is 78722515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51522787 - 2⁷ = 51522659 is a prime.

It is not a weakly prime, because it can be changed into another prime (51522781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25761393 + 25761394.

It is an arithmetic number, because the mean of its divisors is an integer number (25761394).

Almost surely, 2^51522787 is an apocalyptic number.

51522787 is a deficient number, since it is larger than the sum of its proper divisors (1).

51522787 is an equidigital number, since it uses as much as digits as its factorization.

51522787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39200, while the sum is 37.

The square root of 51522787 is about 7177.9375171424. The cubic root of 51522787 is about 372.1058082456.

The spelling of 51522787 in words is "fifty-one million, five hundred twenty-two thousand, seven hundred eighty-seven".