213433142331 has 4 divisors (see below), whose sum is σ = 284577523112. Its totient is φ = 142288761552.

The previous prime is 213433142323. The next prime is 213433142357. The reversal of 213433142331 is 133241334312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213433142331 - 2³ = 213433142323 is a prime.

It is a super-2 number, since 2×213433142331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213433142371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35572190386 + ... + 35572190391.

It is an arithmetic number, because the mean of its divisors is an integer number (71144380778).

Almost surely, 2^213433142331 is an apocalyptic number.

213433142331 is a deficient number, since it is larger than the sum of its proper divisors (71144380781).

213433142331 is an equidigital number, since it uses as much as digits as its factorization.

213433142331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71144380780.

The product of its digits is 15552, while the sum is 30.

Adding to 213433142331 its reverse (133241334312), we get a palindrome (346674476643).

The spelling of 213433142331 in words is "two hundred thirteen billion, four hundred thirty-three million, one hundred forty-two thousand, three hundred thirty-one".