15222985 has 4 divisors (see below), whose sum is σ = 18267588. Its totient is φ = 12178384.

The previous prime is 15222983. The next prime is 15223027. The reversal of 15222985 is 58922251.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5212089 + 10010896 = 2283^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 15222985 - 2¹ = 15222983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15222985.

It is not an unprimeable number, because it can be changed into a prime (15222983) 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, 1522294 + ... + 1522303.

It is an arithmetic number, because the mean of its divisors is an integer number (4566897).

Almost surely, 2^15222985 is an apocalyptic number.

It is an amenable number.

15222985 is a deficient number, since it is larger than the sum of its proper divisors (3044603).

15222985 is an equidigital number, since it uses as much as digits as its factorization.

15222985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044602.

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

The square root of 15222985 is about 3901.6643884373. The cubic root of 15222985 is about 247.8372642485.

The spelling of 15222985 in words is "fifteen million, two hundred twenty-two thousand, nine hundred eighty-five".