131531542 has 8 divisors (see below), whose sum is σ = 197920656. Its totient is φ = 65557992.

The previous prime is 131531489. The next prime is 131531557. The reversal of 131531542 is 245135131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103098 + ... + 104365.

It is an arithmetic number, because the mean of its divisors is an integer number (24740082).

Almost surely, 2^131531542 is an apocalyptic number.

131531542 is a deficient number, since it is larger than the sum of its proper divisors (66389114).

131531542 is a wasteful number, since it uses less digits than its factorization.

131531542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207782.

The product of its digits is 1800, while the sum is 25.

The square root of 131531542 is about 11468.7201552745. The cubic root of 131531542 is about 508.5612944653.

Adding to 131531542 its reverse (245135131), we get a palindrome (376666673).

The spelling of 131531542 in words is "one hundred thirty-one million, five hundred thirty-one thousand, five hundred forty-two".