15550140 has 24 divisors (see below), whose sum is σ = 43540560. Its totient is φ = 4146688.

The previous prime is 15550103. The next prime is 15550141. The reversal of 15550140 is 4105551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550141) 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, 129525 + ... + 129644.

It is an arithmetic number, because the mean of its divisors is an integer number (1814190).

Almost surely, 2^15550140 is an apocalyptic number.

15550140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15550140 is an abundant number, since it is smaller than the sum of its proper divisors (27990420).

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

15550140 is a wasteful number, since it uses less digits than its factorization.

15550140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259181 (or 259179 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 15550140 is about 3943.3665819956. The cubic root of 15550140 is about 249.6001073512.

Adding to 15550140 its reverse (4105551), we get a palindrome (19655691).

The spelling of 15550140 in words is "fifteen million, five hundred fifty thousand, one hundred forty".