213220022240 has 48 divisors (see below), whose sum is σ = 521102393280. Its totient is φ = 82347041280.

The previous prime is 213220022203. The next prime is 213220022329. The reversal of 213220022240 is 42220022312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22971656 + ... + 22980935.

It is an arithmetic number, because the mean of its divisors is an integer number (10856299860).

Almost surely, 2^213220022240 is an apocalyptic number.

213220022240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213220022240 is an abundant number, since it is smaller than the sum of its proper divisors (307882371040).

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

213220022240 is a wasteful number, since it uses less digits than its factorization.

213220022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45952635 (or 45952627 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 213220022240 its reverse (42220022312), we get a palindrome (255440044552).

The spelling of 213220022240 in words is "two hundred thirteen billion, two hundred twenty million, twenty-two thousand, two hundred forty".