15221254 has 4 divisors (see below), whose sum is σ = 22831884. Its totient is φ = 7610626.

The previous prime is 15221251. The next prime is 15221263. The reversal of 15221254 is 45212251.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3805312 + ... + 3805315.

It is an arithmetic number, because the mean of its divisors is an integer number (5707971).

Almost surely, 2^15221254 is an apocalyptic number.

15221254 is a deficient number, since it is larger than the sum of its proper divisors (7610630).

15221254 is an equidigital number, since it uses as much as digits as its factorization.

15221254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610629.

The product of its digits is 800, while the sum is 22.

The square root of 15221254 is about 3901.4425537229. The cubic root of 15221254 is about 247.8278700645.

The spelling of 15221254 in words is "fifteen million, two hundred twenty-one thousand, two hundred fifty-four".