15142220 has 12 divisors (see below), whose sum is σ = 31798704. Its totient is φ = 6056880.

The previous prime is 15142219. The next prime is 15142249. The reversal of 15142220 is 2224151.

15142220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378536 + ... + 378575.

It is an arithmetic number, because the mean of its divisors is an integer number (2649892).

Almost surely, 2^15142220 is an apocalyptic number.

15142220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15142220 is an abundant number, since it is smaller than the sum of its proper divisors (16656484).

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

15142220 is a wasteful number, since it uses less digits than its factorization.

15142220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757120 (or 757118 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 15142220 is about 3891.3005537995. The cubic root of 15142220 is about 247.3981895985.

Adding to 15142220 its reverse (2224151), we get a palindrome (17366371).

The spelling of 15142220 in words is "fifteen million, one hundred forty-two thousand, two hundred twenty".