131540552 has 48 divisors (see below), whose sum is σ = 291980220. Its totient is φ = 55186560.

The previous prime is 131540551. The next prime is 131540573. The reversal of 131540552 is 255045131.

It can be written as a sum of positive squares in 2 ways, for example, as 129367876 + 2172676 = 11374^2 + 1474^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (131540551) 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, 7358 + ... + 17810.

Almost surely, 2^131540552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131540552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145990110).

131540552 is an abundant number, since it is smaller than the sum of its proper divisors (160439668).

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

131540552 is a wasteful number, since it uses less digits than its factorization.

131540552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10494 (or 10479 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 131540552 is about 11469.1129561096. The cubic root of 131540552 is about 508.5729064649.

Adding to 131540552 its reverse (255045131), we get a palindrome (386585683).

The spelling of 131540552 in words is "one hundred thirty-one million, five hundred forty thousand, five hundred fifty-two".