131225239 has 4 divisors (see below), whose sum is σ = 131275080. Its totient is φ = 131175400.

The previous prime is 131225231. The next prime is 131225251. The reversal of 131225239 is 932522131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131225239 - 2³ = 131225231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131225231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20737 + ... + 26314.

It is an arithmetic number, because the mean of its divisors is an integer number (32818770).

Almost surely, 2^131225239 is an apocalyptic number.

131225239 is a deficient number, since it is larger than the sum of its proper divisors (49841).

131225239 is an equidigital number, since it uses as much as digits as its factorization.

131225239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49840.

The product of its digits is 3240, while the sum is 28.

The square root of 131225239 is about 11455.3585277808. The cubic root of 131225239 is about 508.1662183147.

The spelling of 131225239 in words is "one hundred thirty-one million, two hundred twenty-five thousand, two hundred thirty-nine".