213220222431 has 8 divisors (see below), whose sum is σ = 287224492464. Its totient is φ = 140681383680.

The previous prime is 213220222409. The next prime is 213220222451. The reversal of 213220222431 is 134222022312.

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

It is not a de Polignac number, because 213220222431 - 2²⁵ = 213186667999 is a prime.

It is a super-2 number, since 2×213220222431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213220222451) 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, 366357480 + ... + 366358061.

It is an arithmetic number, because the mean of its divisors is an integer number (35903061558).

Almost surely, 2^213220222431 is an apocalyptic number.

213220222431 is a deficient number, since it is larger than the sum of its proper divisors (74004270033).

213220222431 is an equidigital number, since it uses as much as digits as its factorization.

213220222431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732715641.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 213220222431 its reverse (134222022312), we get a palindrome (347442244743).

The spelling of 213220222431 in words is "two hundred thirteen billion, two hundred twenty million, two hundred twenty-two thousand, four hundred thirty-one".