15221074 has 12 divisors (see below), whose sum is σ = 25096302. Its totient is φ = 6918560.

The previous prime is 15221053. The next prime is 15221083. The reversal of 15221074 is 47012251.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 3214849 = 3465^2 + 1793^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31207 + ... + 31690.

Almost surely, 2^15221074 is an apocalyptic number.

15221074 is a deficient number, since it is larger than the sum of its proper divisors (9875228).

15221074 is a wasteful number, since it uses less digits than its factorization.

15221074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62921 (or 62910 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 15221074 is about 3901.4194852643. The cubic root of 15221074 is about 247.8268931587.

The spelling of 15221074 in words is "fifteen million, two hundred twenty-one thousand, seventy-four".