83855025 has 18 divisors (see below), whose sum is σ = 150194070. Its totient is φ = 44722560.

The previous prime is 83855017. The next prime is 83855029. The reversal of 83855025 is 52055838.

83855025 is a `hidden beast` number, since 83 + 8 + 550 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 23155344 + 60699681 = 4812^2 + 7791^2 .

It is not a de Polignac number, because 83855025 - 2³ = 83855017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83855029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 186120 + ... + 186569.

It is an arithmetic number, because the mean of its divisors is an integer number (8344115).

Almost surely, 2^83855025 is an apocalyptic number.

It is an amenable number.

83855025 is a deficient number, since it is larger than the sum of its proper divisors (66339045).

83855025 is a wasteful number, since it uses less digits than its factorization.

83855025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372705 (or 372697 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 83855025 is about 9157.2389397678. The cubic root of 83855025 is about 437.6998162085.

The spelling of 83855025 in words is "eighty-three million, eight hundred fifty-five thousand, twenty-five".