213311020 has 24 divisors (see below), whose sum is σ = 482411664. Its totient is φ = 78760896.

The previous prime is 213311011. The next prime is 213311029. The reversal of 213311020 is 20113312.

It is an interprime number because it is at equal distance from previous prime (213311011) and next prime (213311029).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (213311029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409954 + ... + 410473.

It is an arithmetic number, because the mean of its divisors is an integer number (20100486).

Almost surely, 2^213311020 is an apocalyptic number.

213311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213311020 is an abundant number, since it is smaller than the sum of its proper divisors (269100644).

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

213311020 is a wasteful number, since it uses less digits than its factorization.

213311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820449 (or 820447 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 213311020 is about 14605.1710020801. The cubic root of 213311020 is about 597.4997998400.

Adding to 213311020 its reverse (20113312), we get a palindrome (233424332).

The spelling of 213311020 in words is "two hundred thirteen million, three hundred eleven thousand, twenty".