23131211310 has 96 divisors (see below), whose sum is σ = 62498846592. Its totient is φ = 6155442720.

The previous prime is 23131211309. The next prime is 23131211371. The reversal of 23131211310 is 1311213132.

23131211310 is a `hidden beast` number, since 2 + 31 + 312 + 11 + 310 = 666.

It is a super-2 number, since 2×23131211310² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1183437 + ... + 1202823.

It is an arithmetic number, because the mean of its divisors is an integer number (651029652).

Almost surely, 2^23131211310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131211310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31249423296).

23131211310 is an abundant number, since it is smaller than the sum of its proper divisors (39367635282).

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

23131211310 is a wasteful number, since it uses less digits than its factorization.

23131211310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19900 (or 19888 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 23131211310 its reverse (1311213132), we get a palindrome (24442424442).

The spelling of 23131211310 in words is "twenty-three billion, one hundred thirty-one million, two hundred eleven thousand, three hundred ten".