213310431 has 6 divisors (see below), whose sum is σ = 308115080. Its totient is φ = 142206948.

The previous prime is 213310423. The next prime is 213310451. The reversal of 213310431 is 134013312.

It is not a de Polignac number, because 213310431 - 2³ = 213310423 is a prime.

It is a super-2 number, since 2×213310431² = 91002679946811522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213310421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11850571 + ... + 11850588.

Almost surely, 2^213310431 is an apocalyptic number.

213310431 is a deficient number, since it is larger than the sum of its proper divisors (94804649).

213310431 is a wasteful number, since it uses less digits than its factorization.

213310431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23701165 (or 23701162 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 213310431 is about 14605.1508379749. The cubic root of 213310431 is about 597.4992498955.

Adding to 213310431 its reverse (134013312), we get a palindrome (347323743).

The spelling of 213310431 in words is "two hundred thirteen million, three hundred ten thousand, four hundred thirty-one".