213110431 has 4 divisors (see below), whose sum is σ = 213186600. Its totient is φ = 213034264.

The previous prime is 213110389. The next prime is 213110437. The reversal of 213110431 is 134011312.

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 213110431 - 2¹⁷ = 212979359 is a prime.

It is a super-2 number, since 2×213110431² = 90832111602011522, 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 (213110437) 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, 33721 + ... + 39538.

It is an arithmetic number, because the mean of its divisors is an integer number (53296650).

Almost surely, 2^213110431 is an apocalyptic number.

213110431 is a deficient number, since it is larger than the sum of its proper divisors (76169).

213110431 is an equidigital number, since it uses as much as digits as its factorization.

213110431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76168.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 213110431 is about 14598.3023328057. The cubic root of 213110431 is about 597.3124529401.

Adding to 213110431 its reverse (134011312), we get a palindrome (347121743).

The spelling of 213110431 in words is "two hundred thirteen million, one hundred ten thousand, four hundred thirty-one".