15223861085 has 32 divisors (see below), whose sum is σ = 19257067872. Its totient is φ = 11538616320.

The previous prime is 15223860923. The next prime is 15223861087. The reversal of 15223861085 is 58016832251.

It can be written as a sum of positive squares in 16 ways, for example, as 3094363129 + 12129497956 = 55627^2 + 110134^2 .

It is not a de Polignac number, because 15223861085 - 2²⁴ = 15207083869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223861087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4678319 + ... + 4681571.

It is an arithmetic number, because the mean of its divisors is an integer number (601783371).

Almost surely, 2^15223861085 is an apocalyptic number.

It is an amenable number.

15223861085 is a deficient number, since it is larger than the sum of its proper divisors (4033206787).

15223861085 is a wasteful number, since it uses less digits than its factorization.

15223861085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 15223861085 in words is "fifteen billion, two hundred twenty-three million, eight hundred sixty-one thousand, eighty-five".