131989242 has 48 divisors (see below), whose sum is σ = 335001312. Its totient is φ = 34282080.

The previous prime is 131989217. The next prime is 131989243. The reversal of 131989242 is 242989131.

It is a self number, because there is not a number n which added to its sum of digits gives 131989242.

It is not an unprimeable number, because it can be changed into a prime (131989243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17173 + ... + 23640.

It is an arithmetic number, because the mean of its divisors is an integer number (6979194).

Almost surely, 2^131989242 is an apocalyptic number.

131989242 is an abundant number, since it is smaller than the sum of its proper divisors (203012070).

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

131989242 is a wasteful number, since it uses less digits than its factorization.

131989242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40843 (or 40836 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 131989242 is about 11488.6571016808. The cubic root of 131989242 is about 509.1505042923.

It can be divided in two parts, 131989 and 242, that added together give a palindrome (132231).

The spelling of 131989242 in words is "one hundred thirty-one million, nine hundred eighty-nine thousand, two hundred forty-two".