131111442 has 48 divisors (see below), whose sum is σ = 354174912. Its totient is φ = 34054560.

The previous prime is 131111441. The next prime is 131111443. The reversal of 131111442 is 244111131.

It is an interprime number because it is at equal distance from previous prime (131111441) and next prime (131111443).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (131111441) 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, 45913 + ... + 48684.

It is an arithmetic number, because the mean of its divisors is an integer number (7378644).

Almost surely, 2^131111442 is an apocalyptic number.

131111442 is an abundant number, since it is smaller than the sum of its proper divisors (223063470).

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

131111442 is a wasteful number, since it uses less digits than its factorization.

131111442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94623 (or 94620 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 131111442 is about 11450.3904736913. The cubic root of 131111442 is about 508.0192838899.

Adding to 131111442 its reverse (244111131), we get a palindrome (375222573).

The spelling of 131111442 in words is "one hundred thirty-one million, one hundred eleven thousand, four hundred forty-two".