213220420 has 24 divisors (see below), whose sum is σ = 511729344. Its totient is φ = 73104096.

The previous prime is 213220411. The next prime is 213220421. The reversal of 213220420 is 24022312.

213220420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213220394 and 213220403.

It is not an unprimeable number, because it can be changed into a prime (213220421) 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, 761362 + ... + 761641.

It is an arithmetic number, because the mean of its divisors is an integer number (21322056).

Almost surely, 2^213220420 is an apocalyptic number.

213220420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213220420 is an abundant number, since it is smaller than the sum of its proper divisors (298508924).

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

213220420 is a wasteful number, since it uses less digits than its factorization.

213220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523019 (or 1523017 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 213220420 is about 14602.0690314763. The cubic root of 213220420 is about 597.4151954476.

Adding to 213220420 its reverse (24022312), we get a palindrome (237242732).

The spelling of 213220420 in words is "two hundred thirteen million, two hundred twenty thousand, four hundred twenty".