131542530 has 32 divisors (see below), whose sum is σ = 360802944. Its totient is φ = 30066816.

The previous prime is 131542513. The next prime is 131542597. The reversal of 131542530 is 35245131.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131542530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312987 + ... + 313406.

It is an arithmetic number, because the mean of its divisors is an integer number (11275092).

Almost surely, 2^131542530 is an apocalyptic number.

131542530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131542530 is an abundant number, since it is smaller than the sum of its proper divisors (229260414).

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

131542530 is a wasteful number, since it uses less digits than its factorization.

131542530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626410.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 131542530 is about 11469.1991873888. The cubic root of 131542530 is about 508.5754556210.

Adding to 131542530 its reverse (35245131), we get a palindrome (166787661).

The spelling of 131542530 in words is "one hundred thirty-one million, five hundred forty-two thousand, five hundred thirty".