15505230 has 64 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 3762816.

The previous prime is 15505229. The next prime is 15505271. The reversal of 15505230 is 3250551.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15505197 and 15505206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32131 + ... + 32609.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^15505230 is an apocalyptic number.

15505230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15505230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20321280).

15505230 is an abundant number, since it is smaller than the sum of its proper divisors (25137330).

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

15505230 is a wasteful number, since it uses less digits than its factorization.

15505230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 15505230 is about 3937.6680916502. The cubic root of 15505230 is about 249.3595875551.

Adding to 15505230 its reverse (3250551), we get a palindrome (18755781).

The spelling of 15505230 in words is "fifteen million, five hundred five thousand, two hundred thirty".