23131041551 has 4 divisors (see below), whose sum is σ = 24491691072. Its totient is φ = 21770392032.

The previous prime is 23131041529. The next prime is 23131041553. The reversal of 23131041551 is 15514013132.

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

It is a de Polignac number, because none of the positive numbers 2^k-23131041551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23131041551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131041553) 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, 680324735 + ... + 680324768.

It is an arithmetic number, because the mean of its divisors is an integer number (6122922768).

Almost surely, 2^23131041551 is an apocalyptic number.

23131041551 is a deficient number, since it is larger than the sum of its proper divisors (1360649521).

23131041551 is a wasteful number, since it uses less digits than its factorization.

23131041551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360649520.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 23131041551 its reverse (15514013132), we get a palindrome (38645054683).

The spelling of 23131041551 in words is "twenty-three billion, one hundred thirty-one million, forty-one thousand, five hundred fifty-one".