213431222140 has 24 divisors (see below), whose sum is σ = 448265069280. Its totient is φ = 85361155008.

The previous prime is 213431222129. The next prime is 213431222149. The reversal of 213431222140 is 41222134312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213431222149) 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, 553120 + ... + 856039.

It is an arithmetic number, because the mean of its divisors is an integer number (18677711220).

Almost surely, 2^213431222140 is an apocalyptic number.

213431222140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213431222140 is an abundant number, since it is smaller than the sum of its proper divisors (234833847140).

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

213431222140 is a wasteful number, since it uses less digits than its factorization.

213431222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416741 (or 1416739 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 213431222140 its reverse (41222134312), we get a palindrome (254653356452).

The spelling of 213431222140 in words is "two hundred thirteen billion, four hundred thirty-one million, two hundred twenty-two thousand, one hundred forty".