15221478932 has 12 divisors (see below), whose sum is σ = 29059187136. Its totient is φ = 6918854040.

The previous prime is 15221478931. The next prime is 15221478953. The reversal of 15221478932 is 23987412251.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 345942703 = 15221478932 / (1 + 5 + 2 + 2 + 1 + 4 + 7 + 8 + 9 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221478931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172971308 + ... + 172971395.

It is an arithmetic number, because the mean of its divisors is an integer number (2421598928).

Almost surely, 2^15221478932 is an apocalyptic number.

It is an amenable number.

15221478932 is a deficient number, since it is larger than the sum of its proper divisors (13837708204).

15221478932 is a wasteful number, since it uses less digits than its factorization.

15221478932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345942718 (or 345942716 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 15221478932 in words is "fifteen billion, two hundred twenty-one million, four hundred seventy-eight thousand, nine hundred thirty-two".