210115980 has 144 divisors (see below), whose sum is σ = 663743808. Its totient is φ = 53760000.

The previous prime is 210115957. The next prime is 210115987. The reversal of 210115980 is 89511012.

It is not an unprimeable number, because it can be changed into a prime (210115987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 523780 + ... + 524180.

It is an arithmetic number, because the mean of its divisors is an integer number (4609332).

Almost surely, 2^210115980 is an apocalyptic number.

210115980 is a gapful number since it is divisible by the number (20) 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 210115980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331871904).

210115980 is an abundant number, since it is smaller than the sum of its proper divisors (453627828).

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

210115980 is a wasteful number, since it uses less digits than its factorization.

210115980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 210115980 is about 14495.3778840015. The cubic root of 210115980 is about 594.5015999106.

Adding to 210115980 its reverse (89511012), we get a palindrome (299626992).

It can be divided in two parts, 2101 and 15980, that added together give a palindrome (18081).

The spelling of 210115980 in words is "two hundred ten million, one hundred fifteen thousand, nine hundred eighty".