131225238 has 32 divisors (see below), whose sum is σ = 295615200. Its totient is φ = 43141248.

The previous prime is 131225231. The next prime is 131225251. The reversal of 131225238 is 832522131.

131225238 is a `hidden beast` number, since 13 + 122 + 523 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 12703 + ... + 20586.

It is an arithmetic number, because the mean of its divisors is an integer number (9237975).

Almost surely, 2^131225238 is an apocalyptic number.

131225238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131225238 is an abundant number, since it is smaller than the sum of its proper divisors (164389962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131225238 is a wasteful number, since it uses less digits than its factorization.

131225238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373 (or 33367 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 131225238 is about 11455.3584841331. The cubic root of 131225238 is about 508.1662170239.

Adding to 131225238 its reverse (832522131), we get a palindrome (963747369).

The spelling of 131225238 in words is "one hundred thirty-one million, two hundred twenty-five thousand, two hundred thirty-eight".