15222625 has 16 divisors (see below), whose sum is σ = 20726784. Its totient is φ = 11070000.

The previous prime is 15222583. The next prime is 15222631. The reversal of 15222625 is 52622251.

It is a happy number.

It is not a de Polignac number, because 15222625 - 2¹⁷ = 15091553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 15222625.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4161 + ... + 6910.

It is an arithmetic number, because the mean of its divisors is an integer number (1295424).

Almost surely, 2^15222625 is an apocalyptic number.

It is an amenable number.

15222625 is a deficient number, since it is larger than the sum of its proper divisors (5504159).

15222625 is a wasteful number, since it uses less digits than its factorization.

15222625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11097 (or 11087 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 15222625 is about 3901.6182540069. The cubic root of 15222625 is about 247.8353105773.

Adding to 15222625 its reverse (52622251), we get a palindrome (67844876).

It can be divided in two parts, 152226 and 25, that added together give a palindrome (152251).

The spelling of 15222625 in words is "fifteen million, two hundred twenty-two thousand, six hundred twenty-five".