23531155442 has 4 divisors (see below), whose sum is σ = 35296733166. Its totient is φ = 11765577720.

The previous prime is 23531155391. The next prime is 23531155469. The reversal of 23531155442 is 24455113532.

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., 13917156841 + 9613998601 = 117971^2 + 98051^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5882788859 + ... + 5882788862.

Almost surely, 2^23531155442 is an apocalyptic number.

23531155442 is a deficient number, since it is larger than the sum of its proper divisors (11765577724).

23531155442 is a wasteful number, since it uses less digits than its factorization.

23531155442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11765577723.

The product of its digits is 72000, while the sum is 35.

Adding to 23531155442 its reverse (24455113532), we get a palindrome (47986268974).

The spelling of 23531155442 in words is "twenty-three billion, five hundred thirty-one million, one hundred fifty-five thousand, four hundred forty-two".