131228025 has 24 divisors (see below), whose sum is σ = 218438400. Its totient is φ = 69512640.

The previous prime is 131228021. The next prime is 131228029. The reversal of 131228025 is 520822131.

It is an interprime number because it is at equal distance from previous prime (131228021) and next prime (131228029).

It is not a de Polignac number, because 131228025 - 2² = 131228021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131227986 and 131228004.

It is not an unprimeable number, because it can be changed into a prime (131228021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5304 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (9101600).

Almost surely, 2^131228025 is an apocalyptic number.

131228025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131228025 is a deficient number, since it is larger than the sum of its proper divisors (87210375).

131228025 is a wasteful number, since it uses less digits than its factorization.

131228025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905 (or 11900 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 131228025 is about 11455.4801296148. The cubic root of 131228025 is about 508.1698145261.

The spelling of 131228025 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, twenty-five".