15225612 has 48 divisors (see below), whose sum is σ = 38290560. Its totient is φ = 4693248.

The previous prime is 15225607. The next prime is 15225629. The reversal of 15225612 is 21652251.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9028 + ... + 10580.

It is an arithmetic number, because the mean of its divisors is an integer number (797720).

Almost surely, 2^15225612 is an apocalyptic number.

15225612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15225612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19145280).

15225612 is an abundant number, since it is smaller than the sum of its proper divisors (23064948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15225612 is a wasteful number, since it uses less digits than its factorization.

15225612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1620 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 15225612 is about 3902.0010251152. The cubic root of 15225612 is about 247.8515196884.

Adding to 15225612 its reverse (21652251), we get a palindrome (36877863).

The spelling of 15225612 in words is "fifteen million, two hundred twenty-five thousand, six hundred twelve".