131521254 has 32 divisors (see below), whose sum is σ = 267563520. Its totient is φ = 43092192.

The previous prime is 131521237. The next prime is 131521259. The reversal of 131521254 is 452125131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131521259) 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, 138409 + ... + 139355.

It is an arithmetic number, because the mean of its divisors is an integer number (8361360).

Almost surely, 2^131521254 is an apocalyptic number.

131521254 is an abundant number, since it is smaller than the sum of its proper divisors (136042266).

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

131521254 is a wasteful number, since it uses less digits than its factorization.

131521254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324.

The product of its digits is 1200, while the sum is 24.

The square root of 131521254 is about 11468.2716221757. The cubic root of 131521254 is about 508.5480347434.

Adding to 131521254 its reverse (452125131), we get a palindrome (583646385).

The spelling of 131521254 in words is "one hundred thirty-one million, five hundred twenty-one thousand, two hundred fifty-four".