1661500230 has 32 divisors (see below), whose sum is σ = 4294340064. Its totient is φ = 408984576.

The previous prime is 1661500229. The next prime is 1661500241. The reversal of 1661500230 is 320051661.

It is a self number, because there is not a number n which added to its sum of digits gives 1661500230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2129739 + ... + 2130518.

It is an arithmetic number, because the mean of its divisors is an integer number (134198127).

Almost surely, 2^1661500230 is an apocalyptic number.

1661500230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661500230 is an abundant number, since it is smaller than the sum of its proper divisors (2632839834).

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

1661500230 is a wasteful number, since it uses less digits than its factorization.

1661500230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260280.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1661500230 is about 40761.5042656671. The cubic root of 1661500230 is about 1184.4047358351.

Adding to 1661500230 its reverse (320051661), we get a palindrome (1981551891).

The spelling of 1661500230 in words is "one billion, six hundred sixty-one million, five hundred thousand, two hundred thirty".