213202310331 has 4 divisors (see below), whose sum is σ = 284269747112. Its totient is φ = 142134873552.

The previous prime is 213202310303. The next prime is 213202310359. The reversal of 213202310331 is 133013202312.

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

It is an interprime number because it is at equal distance from previous prime (213202310303) and next prime (213202310359).

It is not a de Polignac number, because 213202310331 - 2¹⁴ = 213202293947 is a prime.

It is a super-2 number, since 2×213202310331² (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 = 213202310298 and 213202310307.

It is not an unprimeable number, because it can be changed into a prime (213202310131) 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, 35533718386 + ... + 35533718391.

It is an arithmetic number, because the mean of its divisors is an integer number (71067436778).

Almost surely, 2^213202310331 is an apocalyptic number.

213202310331 is a deficient number, since it is larger than the sum of its proper divisors (71067436781).

213202310331 is an equidigital number, since it uses as much as digits as its factorization.

213202310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71067436780.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 213202310331 its reverse (133013202312), we get a palindrome (346215512643).

The spelling of 213202310331 in words is "two hundred thirteen billion, two hundred two million, three hundred ten thousand, three hundred thirty-one".