213220332240 has 80 divisors (see below), whose sum is σ = 661051737600. Its totient is φ = 56852845056.

The previous prime is 213220332203. The next prime is 213220332251. The reversal of 213220332240 is 42233022312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 213220332240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2577441 + ... + 2658879.

It is an arithmetic number, because the mean of its divisors is an integer number (8263146720).

Almost surely, 2^213220332240 is an apocalyptic number.

213220332240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213220332240 is an abundant number, since it is smaller than the sum of its proper divisors (447831405360).

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

213220332240 is a wasteful number, since it uses less digits than its factorization.

213220332240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92364 (or 92358 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 213220332240 its reverse (42233022312), we get a palindrome (255453354552).

The spelling of 213220332240 in words is "two hundred thirteen billion, two hundred twenty million, three hundred thirty-two thousand, two hundred forty".