15222859 has 4 divisors (see below), whose sum is σ = 15233704. Its totient is φ = 15212016.

The previous prime is 15222839. The next prime is 15222887. The reversal of 15222859 is 95822251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15222859 is a prime.

It is a super-2 number, since 2×15222859² = 463470872267762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15222839) 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, 2937 + ... + 6250.

It is an arithmetic number, because the mean of its divisors is an integer number (3808426).

Almost surely, 2^15222859 is an apocalyptic number.

15222859 is a deficient number, since it is larger than the sum of its proper divisors (10845).

15222859 is an equidigital number, since it uses as much as digits as its factorization.

15222859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844.

The product of its digits is 14400, while the sum is 34.

The square root of 15222859 is about 3901.6482414487. The cubic root of 15222859 is about 247.8365804671.

The spelling of 15222859 in words is "fifteen million, two hundred twenty-two thousand, eight hundred fifty-nine".