213003231131 has 4 divisors (see below), whose sum is σ = 213004274712. Its totient is φ = 213002187552.

The previous prime is 213003231109. The next prime is 213003231149. The reversal of 213003231131 is 131132300312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213003231131 - 2²² = 212999036827 is a prime.

It is a super-2 number, since 2×213003231131² (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 (213003291131) 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, 104261 + ... + 660966.

It is an arithmetic number, because the mean of its divisors is an integer number (53251068678).

Almost surely, 2^213003231131 is an apocalyptic number.

213003231131 is a deficient number, since it is larger than the sum of its proper divisors (1043581).

213003231131 is an equidigital number, since it uses as much as digits as its factorization.

213003231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043580.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 213003231131 its reverse (131132300312), we get a palindrome (344135531443).

The spelling of 213003231131 in words is "two hundred thirteen billion, three million, two hundred thirty-one thousand, one hundred thirty-one".