15055540 has 24 divisors (see below), whose sum is σ = 33477192. Its totient is φ = 5667840.

The previous prime is 15055531. The next prime is 15055541. The reversal of 15055540 is 4555051.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 13586596 = 1212^2 + 3686^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15055541) 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, 21801 + ... + 22480.

It is an arithmetic number, because the mean of its divisors is an integer number (1394883).

Almost surely, 2^15055540 is an apocalyptic number.

15055540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15055540 is an abundant number, since it is smaller than the sum of its proper divisors (18421652).

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

15055540 is a wasteful number, since it uses less digits than its factorization.

15055540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44307 (or 44305 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 15055540 is about 3880.1469044354. The cubic root of 15055540 is about 246.9252178994.

The spelling of 15055540 in words is "fifteen million, fifty-five thousand, five hundred forty".