213391020 has 24 divisors (see below), whose sum is σ = 597495024. Its totient is φ = 56904256.

The previous prime is 213391001. The next prime is 213391027. The reversal of 213391020 is 20193312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213391027) 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 7 ways as a sum of consecutive naturals, for example, 1778199 + ... + 1778318.

It is an arithmetic number, because the mean of its divisors is an integer number (24895626).

Almost surely, 2^213391020 is an apocalyptic number.

213391020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213391020 is an abundant number, since it is smaller than the sum of its proper divisors (384104004).

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

213391020 is a wasteful number, since it uses less digits than its factorization.

213391020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556529 (or 3556527 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 213391020 is about 14607.9095013626. The cubic root of 213391020 is about 597.5744857917.

The spelling of 213391020 in words is "two hundred thirteen million, three hundred ninety-one thousand, twenty".