23551320215 has 16 divisors (see below), whose sum is σ = 28346568096. Its totient is φ = 18784483200.

The previous prime is 23551320161. The next prime is 23551320229. The reversal of 23551320215 is 51202315532.

It is not a de Polignac number, because 23551320215 - 2²⁶ = 23484211351 is a prime.

It is a super-3 number, since 3×23551320215³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2665505 + ... + 2674325.

It is an arithmetic number, because the mean of its divisors is an integer number (1771660506).

Almost surely, 2^23551320215 is an apocalyptic number.

23551320215 is a deficient number, since it is larger than the sum of its proper divisors (4795247881).

23551320215 is a wasteful number, since it uses less digits than its factorization.

23551320215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 23551320215 its reverse (51202315532), we get a palindrome (74753635747).

The spelling of 23551320215 in words is "twenty-three billion, five hundred fifty-one million, three hundred twenty thousand, two hundred fifteen".