15425220 has 48 divisors (see below), whose sum is σ = 43380288. Its totient is φ = 4095360.

The previous prime is 15425219. The next prime is 15425233. The reversal of 15425220 is 2252451.

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, 18615 + ... + 19425.

It is an arithmetic number, because the mean of its divisors is an integer number (903756).

Almost surely, 2^15425220 is an apocalyptic number.

15425220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15425220 is an abundant number, since it is smaller than the sum of its proper divisors (27955068).

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

15425220 is a wasteful number, since it uses less digits than its factorization.

15425220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 15425220 is about 3927.4953851023. The cubic root of 15425220 is about 248.9299330282.

Adding to 15425220 its reverse (2252451), we get a palindrome (17677671).

The spelling of 15425220 in words is "fifteen million, four hundred twenty-five thousand, two hundred twenty".