2525081138 has 16 divisors (see below), whose sum is σ = 3828769560. Its totient is φ = 1248863616.

The previous prime is 2525081137. The next prime is 2525081159. The reversal of 2525081138 is 8311805252.

It can be written as a sum of positive squares in 4 ways, for example, as 2404235089 + 120846049 = 49033^2 + 10993^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2525081098 and 2525081107.

It is not an unprimeable number, because it can be changed into a prime (2525081137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125120 + ... + 143892.

Almost surely, 2^2525081138 is an apocalyptic number.

2525081138 is a deficient number, since it is larger than the sum of its proper divisors (1303688422).

2525081138 is a wasteful number, since it uses less digits than its factorization.

2525081138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19501.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 2525081138 is about 50250.1854523941. The cubic root of 2525081138 is about 1361.7324263790.

The spelling of 2525081138 in words is "two billion, five hundred twenty-five million, eighty-one thousand, one hundred thirty-eight".