213980820 has 48 divisors (see below), whose sum is σ = 599876928. Its totient is φ = 56992000.

The previous prime is 213980813. The next prime is 213980827. The reversal of 213980820 is 28089312.

It is an interprime number because it is at equal distance from previous prime (213980813) and next prime (213980827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213980827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64195 + ... + 67445.

It is an arithmetic number, because the mean of its divisors is an integer number (12497436).

Almost surely, 2^213980820 is an apocalyptic number.

213980820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213980820 is an abundant number, since it is smaller than the sum of its proper divisors (385896108).

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

213980820 is a wasteful number, since it uses less digits than its factorization.

213980820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360 (or 4358 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 213980820 is about 14628.0832647343. The cubic root of 213980820 is about 598.1245327010.

The spelling of 213980820 in words is "two hundred thirteen million, nine hundred eighty thousand, eight hundred twenty".