213140231231 has 4 divisors (see below), whose sum is σ = 214256148864. Its totient is φ = 212024313600.

The previous prime is 213140231167. The next prime is 213140231243. The reversal of 213140231231 is 132132041312.

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

It is a cyclic number.

It is not a de Polignac number, because 213140231231 - 2⁶ = 213140231167 is a prime.

It is a super-2 number, since 2×213140231231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213140231197 and 213140231206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213140231431) 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, 557958530 + ... + 557958911.

It is an arithmetic number, because the mean of its divisors is an integer number (53564037216).

Almost surely, 2^213140231231 is an apocalyptic number.

213140231231 is a deficient number, since it is larger than the sum of its proper divisors (1115917633).

213140231231 is a wasteful number, since it uses less digits than its factorization.

213140231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115917632.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 213140231231 its reverse (132132041312), we get a palindrome (345272272543).

The spelling of 213140231231 in words is "two hundred thirteen billion, one hundred forty million, two hundred thirty-one thousand, two hundred thirty-one".