213142234322440 has 64 divisors (see below), whose sum is σ = 504812849688000. Its totient is φ = 80769321642240.

The previous prime is 213142234322431. The next prime is 213142234322443. The reversal of 213142234322440 is 44223432241312.

It is a super-2 number, since 2×213142234322440² (a number of 29 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 213142234322440.

It is not an unprimeable number, because it can be changed into a prime (213142234322443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214326271 + ... + 215318449.

It is an arithmetic number, because the mean of its divisors is an integer number (7887700776375).

Almost surely, 2^{213142234322440} is an apocalyptic number.

213142234322440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213142234322440 is an abundant number, since it is smaller than the sum of its proper divisors (291670615365560).

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

213142234322440 is a wasteful number, since it uses less digits than its factorization.

213142234322440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274870 (or 1274866 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 213142234322440 its reverse (44223432241312), we get a palindrome (257365666563752).

The spelling of 213142234322440 in words is "two hundred thirteen trillion, one hundred forty-two billion, two hundred thirty-four million, three hundred twenty-two thousand, four hundred forty".