15221480 has 32 divisors (see below), whose sum is σ = 34365600. Its totient is φ = 6067776.

The previous prime is 15221431. The next prime is 15221501. The reversal of 15221480 is 8412251.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17291 + ... + 18149.

It is an arithmetic number, because the mean of its divisors is an integer number (1073925).

Almost surely, 2^15221480 is an apocalyptic number.

15221480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15221480 is an abundant number, since it is smaller than the sum of its proper divisors (19144120).

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

15221480 is a wasteful number, since it uses less digits than its factorization.

15221480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 15221480 is about 3901.4715172611. The cubic root of 15221480 is about 247.8290966130.

The spelling of 15221480 in words is "fifteen million, two hundred twenty-one thousand, four hundred eighty".