20155125 has 32 divisors (see below), whose sum is σ = 34055424. Its totient is φ = 10584000.

The previous prime is 20155117. The next prime is 20155127. The reversal of 20155125 is 52155102.

It is not a de Polignac number, because 20155125 - 2³ = 20155117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26247 + ... + 27003.

It is an arithmetic number, because the mean of its divisors is an integer number (1064232).

Almost surely, 2^20155125 is an apocalyptic number.

20155125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20155125 is a deficient number, since it is larger than the sum of its proper divisors (13900299).

20155125 is an equidigital number, since it uses as much as digits as its factorization.

20155125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 20155125 is about 4489.4459569083. The cubic root of 20155125 is about 272.1417450726.

It can be divided in two parts, 2015 and 5125, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 20155125 in words is "twenty million, one hundred fifty-five thousand, one hundred twenty-five".