15312140 has 24 divisors (see below), whose sum is σ = 33194112. Its totient is φ = 5927040.

The previous prime is 15312131. The next prime is 15312149. The reversal of 15312140 is 4121351.

It is an interprime number because it is at equal distance from previous prime (15312131) and next prime (15312149).

It is not an unprimeable number, because it can be changed into a prime (15312149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11729 + ... + 12968.

It is an arithmetic number, because the mean of its divisors is an integer number (1383088).

Almost surely, 2^15312140 is an apocalyptic number.

15312140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15312140 is an abundant number, since it is smaller than the sum of its proper divisors (17881972).

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

15312140 is a wasteful number, since it uses less digits than its factorization.

15312140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24737 (or 24735 counting only the distinct ones).

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

The square root of 15312140 is about 3913.0729612416. The cubic root of 15312140 is about 248.3201510452.

Adding to 15312140 its reverse (4121351), we get a palindrome (19433491).

The spelling of 15312140 in words is "fifteen million, three hundred twelve thousand, one hundred forty".