131031252 has 36 divisors (see below), whose sum is σ = 361329696. Its totient is φ = 39706320.

The previous prime is 131031227. The next prime is 131031259. The reversal of 131031252 is 252130131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165048 + ... + 165839.

It is an arithmetic number, because the mean of its divisors is an integer number (10036936).

Almost surely, 2^131031252 is an apocalyptic number.

131031252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131031252 is an abundant number, since it is smaller than the sum of its proper divisors (230298444).

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

131031252 is a wasteful number, since it uses less digits than its factorization.

131031252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330908 (or 330903 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 131031252 is about 11446.8883108031. Note that the first 3 decimals coincide. The cubic root of 131031252 is about 507.9156916736.

Adding to 131031252 its reverse (252130131), we get a palindrome (383161383).

The spelling of 131031252 in words is "one hundred thirty-one million, thirty-one thousand, two hundred fifty-two".