2155460625 has 50 divisors (see below), whose sum is σ = 4023663578. Its totient is φ = 1149552000.

The previous prime is 2155460623. The next prime is 2155460633. The reversal of 2155460625 is 5260645512.

2155460625 is a `hidden beast` number, since 21 + 5 + 5 + 4 + 6 + 0 + 625 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 382124304 + 1773336321 = 19548^2 + 42111^2 .

It is not a de Polignac number, because 2155460625 - 2¹ = 2155460623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155460625.

It is not an unprimeable number, because it can be changed into a prime (2155460623) by changing a digit.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 29337 + ... + 71913.

Almost surely, 2^2155460625 is an apocalyptic number.

2155460625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155460625 is a deficient number, since it is larger than the sum of its proper divisors (1868202953).

2155460625 is an frugal number, since it uses more digits than its factorization.

2155460625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42609 (or 42585 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 2155460625 is about 46426.9385701879. The cubic root of 2155460625 is about 1291.7546431001.

The spelling of 2155460625 in words is "two billion, one hundred fifty-five million, four hundred sixty thousand, six hundred twenty-five".