15412221209 has 24 divisors (see below), whose sum is σ = 19381287744. Its totient is φ = 11996820000.

The previous prime is 15412221191. The next prime is 15412221329. The reversal of 15412221209 is 90212221451.

It is not a de Polignac number, because 15412221209 - 2²⁸ = 15143785753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15412221109) 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, 835334 + ... + 853584.

It is an arithmetic number, because the mean of its divisors is an integer number (807553656).

Almost surely, 2^15412221209 is an apocalyptic number.

It is an amenable number.

15412221209 is a deficient number, since it is larger than the sum of its proper divisors (3969066535).

15412221209 is a wasteful number, since it uses less digits than its factorization.

15412221209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19277 (or 19266 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 15412221209 in words is "fifteen billion, four hundred twelve million, two hundred twenty-one thousand, two hundred nine".