15212219994 has 96 divisors (see below), whose sum is σ = 34918760448. Its totient is φ = 4778676000.

The previous prime is 15212219933. The next prime is 15212220031. The reversal of 15212219994 is 49991221251.

15212219994 is a `hidden beast` number, since 1 + 521 + 22 + 19 + 9 + 94 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10340679 + ... + 10342149.

It is an arithmetic number, because the mean of its divisors is an integer number (363737088).

Almost surely, 2^15212219994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15212219994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17459380224).

15212219994 is an abundant number, since it is smaller than the sum of its proper divisors (19706540454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15212219994 is a wasteful number, since it uses less digits than its factorization.

15212219994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1981 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The spelling of 15212219994 in words is "fifteen billion, two hundred twelve million, two hundred nineteen thousand, nine hundred ninety-four".