15172257240 has 576 divisors, whose sum is σ = 60826671360. Its totient is φ = 3211776000.

The previous prime is 15172257229. The next prime is 15172257241. The reversal of 15172257240 is 4275227151.

15172257240 is a `hidden beast` number, since 15 + 1 + 72 + 2 + 572 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 15172257195 and 15172257204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15172257241) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 60447115 + ... + 60447365.

It is an arithmetic number, because the mean of its divisors is an integer number (105601860).

Almost surely, 2^15172257240 is an apocalyptic number.

15172257240 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 15172257240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30413335680).

15172257240 is an abundant number, since it is smaller than the sum of its proper divisors (45654414120).

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

15172257240 is a wasteful number, since it uses less digits than its factorization.

15172257240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 15172257240 in words is "fifteen billion, one hundred seventy-two million, two hundred fifty-seven thousand, two hundred forty".