213122297240 has 64 divisors (see below), whose sum is σ = 508075934400. Its totient is φ = 80180011008.

The previous prime is 213122297239. The next prime is 213122297273. The reversal of 213122297240 is 42792221312.

It is a super-2 number, since 2×213122297240² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213122297240.

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, 907277 + ... + 1117763.

It is an arithmetic number, because the mean of its divisors is an integer number (7938686475).

Almost surely, 2^213122297240 is an apocalyptic number.

213122297240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213122297240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254037967200).

213122297240 is an abundant number, since it is smaller than the sum of its proper divisors (294953637160).

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

213122297240 is a wasteful number, since it uses less digits than its factorization.

213122297240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212004 (or 212000 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 213122297240 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred ninety-seven thousand, two hundred forty".