23131442 has 4 divisors (see below), whose sum is σ = 34697166. Its totient is φ = 11565720.

The previous prime is 23131429. The next prime is 23131453. The reversal of 23131442 is 24413132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17799961 + 5331481 = 4219^2 + 2309^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782859 + ... + 5782862.

Almost surely, 2^23131442 is an apocalyptic number.

23131442 is a deficient number, since it is larger than the sum of its proper divisors (11565724).

23131442 is a wasteful number, since it uses less digits than its factorization.

23131442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11565723.

The product of its digits is 576, while the sum is 20.

The square root of 23131442 is about 4809.5157760423. The cubic root of 23131442 is about 284.9274135449.

Adding to 23131442 its reverse (24413132), we get a palindrome (47544574).

The spelling of 23131442 in words is "twenty-three million, one hundred thirty-one thousand, four hundred forty-two".