213044431 has 8 divisors (see below), whose sum is σ = 220233728. Its totient is φ = 205875000.

The previous prime is 213044417. The next prime is 213044443. The reversal of 213044431 is 134440312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213044431 - 2⁵ = 213044399 is a prime.

It is a super-2 number, since 2×213044431² = 90775859160227522, 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 (213044831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18706 + ... + 27856.

It is an arithmetic number, because the mean of its divisors is an integer number (27529216).

Almost surely, 2^213044431 is an apocalyptic number.

213044431 is a deficient number, since it is larger than the sum of its proper divisors (7189297).

213044431 is an equidigital number, since it uses as much as digits as its factorization.

213044431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 213044431 is about 14596.0416209327. The cubic root of 213044431 is about 597.2507842986.

Adding to 213044431 its reverse (134440312), we get a palindrome (347484743).

The spelling of 213044431 in words is "two hundred thirteen million, forty-four thousand, four hundred thirty-one".