15555132 has 48 divisors (see below), whose sum is σ = 40901280. Its totient is φ = 5111424.

The previous prime is 15555109. The next prime is 15555139. The reversal of 15555132 is 23155551.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 15555096 and 15555105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15555139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6898 + ... + 8870.

It is an arithmetic number, because the mean of its divisors is an integer number (852110).

Almost surely, 2^15555132 is an apocalyptic number.

15555132 is a gapful number since it is divisible by the number (12) 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 15555132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20450640).

15555132 is an abundant number, since it is smaller than the sum of its proper divisors (25346148).

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

15555132 is a wasteful number, since it uses less digits than its factorization.

15555132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2051 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 15555132 is about 3943.9994929006. Note that the first 3 decimals coincide. The cubic root of 15555132 is about 249.6268138723.

The spelling of 15555132 in words is "fifteen million, five hundred fifty-five thousand, one hundred thirty-two".