131423442 has 8 divisors (see below), whose sum is σ = 262846896. Its totient is φ = 43807812.

The previous prime is 131423423. The next prime is 131423443. The reversal of 131423442 is 244324131.

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

131423442 is an admirable number.

It is a super-2 number, since 2×131423442² = 34544242214254728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131423443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10951948 + ... + 10951959.

It is an arithmetic number, because the mean of its divisors is an integer number (32855862).

Almost surely, 2^131423442 is an apocalyptic number.

131423442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131423442 is a wasteful number, since it uses less digits than its factorization.

131423442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21903912.

The product of its digits is 2304, while the sum is 24.

The square root of 131423442 is about 11464.0063677582. The cubic root of 131423442 is about 508.4219348800.

Adding to 131423442 its reverse (244324131), we get a palindrome (375747573).

The spelling of 131423442 in words is "one hundred thirty-one million, four hundred twenty-three thousand, four hundred forty-two".