15231140 has 24 divisors (see below), whose sum is σ = 32591160. Its totient is φ = 5977088.

The previous prime is 15231127. The next prime is 15231173. The reversal of 15231140 is 4113251.

It can be written as a sum of positive squares in 4 ways, for example, as 3356224 + 11874916 = 1832^2 + 3446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (1357965).

Almost surely, 2^15231140 is an apocalyptic number.

15231140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15231140 is an abundant number, since it is smaller than the sum of its proper divisors (17360020).

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

15231140 is a wasteful number, since it uses less digits than its factorization.

15231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14431 (or 14429 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 15231140 is about 3902.7093153347. The cubic root of 15231140 is about 247.8815120770.

Adding to 15231140 its reverse (4113251), we get a palindrome (19344391).

The spelling of 15231140 in words is "fifteen million, two hundred thirty-one thousand, one hundred forty".