15221622314623 has 24 divisors (see below), whose sum is σ = 16435909249760. Its totient is φ = 14090389931520.

The previous prime is 15221622314597. The next prime is 15221622314651. The reversal of 15221622314623 is 32641322612251.

It is not a de Polignac number, because 15221622314623 - 2⁹ = 15221622314111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221622314023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407969293 + ... + 408006601.

Almost surely, 2^{15221622314623} is an apocalyptic number.

15221622314623 is a deficient number, since it is larger than the sum of its proper divisors (1214286935137).

15221622314623 is a wasteful number, since it uses less digits than its factorization.

15221622314623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60547 (or 60530 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

Adding to 15221622314623 its reverse (32641322612251), we get a palindrome (47862944926874).

The spelling of 15221622314623 in words is "fifteen trillion, two hundred twenty-one billion, six hundred twenty-two million, three hundred fourteen thousand, six hundred twenty-three".