23531213234 has 16 divisors (see below), whose sum is σ = 37112546520. Its totient is φ = 11173666560.

The previous prime is 23531213227. The next prime is 23531213239. The reversal of 23531213234 is 43231213532.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20193262609 + 3337950625 = 142103^2 + 57775^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 23531213197 and 23531213206.

It is not an unprimeable number, because it can be changed into a prime (23531213239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321959 + ... + 3329034.

Almost surely, 2^23531213234 is an apocalyptic number.

23531213234 is a deficient number, since it is larger than the sum of its proper divisors (13581333286).

23531213234 is a wasteful number, since it uses less digits than its factorization.

23531213234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651085.

The product of its digits is 12960, while the sum is 29.

Adding to 23531213234 its reverse (43231213532), we get a palindrome (66762426766).

The spelling of 23531213234 in words is "twenty-three billion, five hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-four".