15251232540 has 48 divisors (see below), whose sum is σ = 42986280960. Its totient is φ = 4040059200.

The previous prime is 15251232539. The next prime is 15251232589. The reversal of 15251232540 is 4523215251.

15251232540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15251232498 and 15251232507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832620 + ... + 850739.

It is an arithmetic number, because the mean of its divisors is an integer number (895547520).

Almost surely, 2^15251232540 is an apocalyptic number.

15251232540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15251232540 is an abundant number, since it is smaller than the sum of its proper divisors (27735048420).

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

15251232540 is a wasteful number, since it uses less digits than its factorization.

15251232540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683522 (or 1683520 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 15251232540 its reverse (4523215251), we get a palindrome (19774447791).

The spelling of 15251232540 in words is "fifteen billion, two hundred fifty-one million, two hundred thirty-two thousand, five hundred forty".