23782215531 has 8 divisors (see below), whose sum is σ = 31724023360. Its totient is φ = 15847609032.

The previous prime is 23782215529. The next prime is 23782215601. The reversal of 23782215531 is 13551228732.

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

It is not a de Polignac number, because 23782215531 - 2¹ = 23782215529 is a prime.

It is a super-2 number, since 2×23782215531² (a number of 22 digits) contains 22 as substring.

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 23782215531.

It is not an unprimeable number, because it can be changed into a prime (23782215521) 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, 1792621 + ... + 1805838.

It is an arithmetic number, because the mean of its divisors is an integer number (3965502920).

Almost surely, 2^23782215531 is an apocalyptic number.

23782215531 is a deficient number, since it is larger than the sum of its proper divisors (7941807829).

23782215531 is a wasteful number, since it uses less digits than its factorization.

23782215531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600665.

The product of its digits is 100800, while the sum is 39.

The spelling of 23782215531 in words is "twenty-three billion, seven hundred eighty-two million, two hundred fifteen thousand, five hundred thirty-one".