15252515240 has 64 divisors (see below), whose sum is σ = 36324288000. Its totient is φ = 5747915520.

The previous prime is 15252515237. The next prime is 15252515263. The reversal of 15252515240 is 4251525251.

It is a happy number.

It is a super-2 number, since 2×15252515240² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15252515197 and 15252515206.

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, 82121 + ... + 192999.

It is an arithmetic number, because the mean of its divisors is an integer number (567567000).

Almost surely, 2^15252515240 is an apocalyptic number.

15252515240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15252515240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18162144000).

15252515240 is an abundant number, since it is smaller than the sum of its proper divisors (21071772760).

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

15252515240 is a wasteful number, since it uses less digits than its factorization.

15252515240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111090 (or 111086 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 15252515240 in words is "fifteen billion, two hundred fifty-two million, five hundred fifteen thousand, two hundred forty".