51840459225 has 81 divisors (see below), whose sum is σ = 95331648477. Its totient is φ = 26928760320.

The previous prime is 51840459169. The next prime is 51840459271. The reversal of 51840459225 is 52295404815.

The square root of 51840459225 is 227685.

It is a perfect power (a square), and thus also a powerful number.

51840459225 is a `hidden beast` number, since 5 + 18 + 40 + 4 + 592 + 2 + 5 = 666.

51840459225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2838438729 + 49002020496 = 53277^2 + 221364^2 .

It is not a de Polignac number, because 51840459225 - 2²⁷ = 51706241497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 146856649 + ... + 146857001.

Almost surely, 2^51840459225 is an apocalyptic number.

51840459225 is the 227685-th square number.

51840459225 is the 113843-rd centered octagonal number.

It is an amenable number.

51840459225 is a deficient number, since it is larger than the sum of its proper divisors (43491189252).

51840459225 is an equidigital number, since it uses as much as digits as its factorization.

51840459225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 51840459225 in words is "fifty-one billion, eight hundred forty million, four hundred fifty-nine thousand, two hundred twenty-five".