131321252 has 6 divisors (see below), whose sum is σ = 229812198. Its totient is φ = 65660624.

The previous prime is 131321249. The next prime is 131321257. The reversal of 131321252 is 252123131.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 50608996 = 8984^2 + 7114^2 .

It is not an unprimeable number, because it can be changed into a prime (131321257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16415153 + ... + 16415160.

It is an arithmetic number, because the mean of its divisors is an integer number (38302033).

Almost surely, 2^131321252 is an apocalyptic number.

It is an amenable number.

131321252 is a deficient number, since it is larger than the sum of its proper divisors (98490946).

131321252 is a wasteful number, since it uses less digits than its factorization.

131321252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32830317 (or 32830315 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 131321252 is about 11459.5485076856. The cubic root of 131321252 is about 508.2901240229.

Adding to 131321252 its reverse (252123131), we get a palindrome (383444383).

The spelling of 131321252 in words is "one hundred thirty-one million, three hundred twenty-one thousand, two hundred fifty-two".