2212145231 has 4 divisors (see below), whose sum is σ = 2245162392. Its totient is φ = 2179128072.

The previous prime is 2212145219. The next prime is 2212145239. The reversal of 2212145231 is 1325412122.

2212145231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212145231 is a prime.

It is a super-2 number, since 2×2212145231² = 9787173046072086722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212145197 and 2212145206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212145239) 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, 16508480 + ... + 16508613.

It is an arithmetic number, because the mean of its divisors is an integer number (561290598).

Almost surely, 2^2212145231 is an apocalyptic number.

2212145231 is a deficient number, since it is larger than the sum of its proper divisors (33017161).

2212145231 is an equidigital number, since it uses as much as digits as its factorization.

2212145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33017160.

The product of its digits is 960, while the sum is 23.

The square root of 2212145231 is about 47033.4480024588. The cubic root of 2212145231 is about 1302.9803869765.

Adding to 2212145231 its reverse (1325412122), we get a palindrome (3537557353).

The spelling of 2212145231 in words is "two billion, two hundred twelve million, one hundred forty-five thousand, two hundred thirty-one".