23131310021511 has 8 divisors (see below), whose sum is σ = 32655967089264. Its totient is φ = 14513763150720.

The previous prime is 23131310021503. The next prime is 23131310021513. The reversal of 23131310021511 is 11512001313132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23131310021511 - 2³ = 23131310021503 is a prime.

It is a super-2 number, since 2×23131310021511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131310021513) 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, 226777549180 + ... + 226777549281.

It is an arithmetic number, because the mean of its divisors is an integer number (4081995886158).

Almost surely, 2^{23131310021511} is an apocalyptic number.

23131310021511 is a deficient number, since it is larger than the sum of its proper divisors (9524657067753).

23131310021511 is a wasteful number, since it uses less digits than its factorization.

23131310021511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453555098481.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 23131310021511 its reverse (11512001313132), we get a palindrome (34643311334643).

The spelling of 23131310021511 in words is "twenty-three trillion, one hundred thirty-one billion, three hundred ten million, twenty-one thousand, five hundred eleven".