15155255240 has 32 divisors (see below), whose sum is σ = 34112708280. Its totient is φ = 6059722752.

The previous prime is 15155255123. The next prime is 15155255249. The reversal of 15155255240 is 4255255151.

It can be written as a sum of positive squares in 4 ways, for example, as 14388962116 + 766293124 = 119954^2 + 27682^2 .

It is a super-2 number, since 2×15155255240² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15155255240.

It is not an unprimeable number, because it can be changed into a prime (15155255249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30662 + ... + 176778.

Almost surely, 2^15155255240 is an apocalyptic number.

15155255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15155255240 is an abundant number, since it is smaller than the sum of its proper divisors (18957453040).

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

15155255240 is a wasteful number, since it uses less digits than its factorization.

15155255240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148721 (or 148717 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 15155255240 in words is "fifteen billion, one hundred fifty-five million, two hundred fifty-five thousand, two hundred forty".