213225025231 has 32 divisors (see below), whose sum is σ = 243330531840. Its totient is φ = 185581476864.

The previous prime is 213225025229. The next prime is 213225025243. The reversal of 213225025231 is 132520522312.

It is a cyclic number.

It is not a de Polignac number, because 213225025231 - 2¹ = 213225025229 is a prime.

It is a super-2 number, since 2×213225025231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213225025231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213225025201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27676926 + ... + 27684628.

It is an arithmetic number, because the mean of its divisors is an integer number (7604079120).

Almost surely, 2^213225025231 is an apocalyptic number.

213225025231 is a deficient number, since it is larger than the sum of its proper divisors (30105506609).

213225025231 is a wasteful number, since it uses less digits than its factorization.

213225025231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 213225025231 its reverse (132520522312), we get a palindrome (345745547543).

The spelling of 213225025231 in words is "two hundred thirteen billion, two hundred twenty-five million, twenty-five thousand, two hundred thirty-one".