15221314984 has 8 divisors (see below), whose sum is σ = 28539965610. Its totient is φ = 7610657488.

The previous prime is 15221314949. The next prime is 15221315009. The reversal of 15221314984 is 48941312251.

It can be written as a sum of positive squares in only one way, i.e., 14418726084 + 802588900 = 120078^2 + 28330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951332179 + ... + 951332194.

Almost surely, 2^15221314984 is an apocalyptic number.

It is an amenable number.

15221314984 is a deficient number, since it is larger than the sum of its proper divisors (13318650626).

15221314984 is a wasteful number, since it uses less digits than its factorization.

15221314984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902664379 (or 1902664375 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The spelling of 15221314984 in words is "fifteen billion, two hundred twenty-one million, three hundred fourteen thousand, nine hundred eighty-four".