51425489 has 2 divisors, whose sum is σ = 51425490. Its totient is φ = 51425488.

The previous prime is 51425477. The next prime is 51425551. The reversal of 51425489 is 98452415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28462225 + 22963264 = 5335^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 51425489 - 2²⁰ = 50376913 is a prime.

It is not a weakly prime, because it can be changed into another prime (51415489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25712744 + 25712745.

It is an arithmetic number, because the mean of its divisors is an integer number (25712745).

Almost surely, 2^51425489 is an apocalyptic number.

It is an amenable number.

51425489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51425489 is an equidigital number, since it uses as much as digits as its factorization.

51425489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 51425489 is about 7171.1567407218. The cubic root of 51425489 is about 371.8714267387.

The spelling of 51425489 in words is "fifty-one million, four hundred twenty-five thousand, four hundred eighty-nine".