213023431240 has 64 divisors (see below), whose sum is σ = 495957394800. Its totient is φ = 82250047488.

The previous prime is 213023431193. The next prime is 213023431249. The reversal of 213023431240 is 42134320312.

It can be written as a sum of positive squares in 8 ways, for example, as 122952617316 + 90070813924 = 350646^2 + 300118^2 .

It is not an unprimeable number, because it can be changed into a prime (213023431249) 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, 4963152 + ... + 5005888.

Almost surely, 2^213023431240 is an apocalyptic number.

213023431240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213023431240 is an abundant number, since it is smaller than the sum of its proper divisors (282933963560).

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

213023431240 is a wasteful number, since it uses less digits than its factorization.

213023431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47074 (or 47070 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 213023431240 its reverse (42134320312), we get a palindrome (255157751552).

The spelling of 213023431240 in words is "two hundred thirteen billion, twenty-three million, four hundred thirty-one thousand, two hundred forty".