213945980 has 12 divisors (see below), whose sum is σ = 449286600. Its totient is φ = 85578384.

The previous prime is 213945923. The next prime is 213945989. The reversal of 213945980 is 89549312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213945989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5348630 + ... + 5348669.

It is an arithmetic number, because the mean of its divisors is an integer number (37440550).

Almost surely, 2^213945980 is an apocalyptic number.

213945980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213945980 is an abundant number, since it is smaller than the sum of its proper divisors (235340620).

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

213945980 is a wasteful number, since it uses less digits than its factorization.

213945980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697308 (or 10697306 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 213945980 is about 14626.8923562047. The cubic root of 213945980 is about 598.0920690596.

The spelling of 213945980 in words is "two hundred thirteen million, nine hundred forty-five thousand, nine hundred eighty".