15225020 has 12 divisors (see below), whose sum is σ = 31972584. Its totient is φ = 6090000.

The previous prime is 15224983. The next prime is 15225031. The reversal of 15225020 is 2052251.

It is a self number, because there is not a number n which added to its sum of digits gives 15225020.

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 3 ways as a sum of consecutive naturals, for example, 380606 + ... + 380645.

It is an arithmetic number, because the mean of its divisors is an integer number (2664382).

Almost surely, 2^15225020 is an apocalyptic number.

15225020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15225020 is an abundant number, since it is smaller than the sum of its proper divisors (16747564).

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

15225020 is a wasteful number, since it uses less digits than its factorization.

15225020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761260 (or 761258 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 15225020 is about 3901.9251658636. The cubic root of 15225020 is about 247.8483073380.

Adding to 15225020 its reverse (2052251), we get a palindrome (17277271).

The spelling of 15225020 in words is "fifteen million, two hundred twenty-five thousand, twenty".