131213442 has 16 divisors (see below), whose sum is σ = 262604160. Its totient is φ = 43708272.

The previous prime is 131213441. The next prime is 131213461. The reversal of 131213442 is 244312131.

It is a super-2 number, since 2×131213442² = 34433934722974728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131213441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3463 + ... + 16565.

It is an arithmetic number, because the mean of its divisors is an integer number (16412760).

Almost surely, 2^131213442 is an apocalyptic number.

131213442 is an abundant number, since it is smaller than the sum of its proper divisors (131390718).

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

131213442 is a wasteful number, since it uses less digits than its factorization.

131213442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14777.

The product of its digits is 576, while the sum is 21.

The square root of 131213442 is about 11454.8436043448. The cubic root of 131213442 is about 508.1509900030.

Adding to 131213442 its reverse (244312131), we get a palindrome (375525573).

The spelling of 131213442 in words is "one hundred thirty-one million, two hundred thirteen thousand, four hundred forty-two".