2221400231 has 4 divisors (see below), whose sum is σ = 2221902432. Its totient is φ = 2220898032.

The previous prime is 2221400227. The next prime is 2221400239. The reversal of 2221400231 is 1320041222.

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 2221400231 - 2² = 2221400227 is a prime.

It is a super-2 number, since 2×2221400231² = 9869237972573706722, 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 (2221400239) 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, 244406 + ... + 253331.

It is an arithmetic number, because the mean of its divisors is an integer number (555475608).

Almost surely, 2^2221400231 is an apocalyptic number.

2221400231 is a deficient number, since it is larger than the sum of its proper divisors (502201).

2221400231 is an equidigital number, since it uses as much as digits as its factorization.

2221400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502200.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2221400231 is about 47131.7327392066. The cubic root of 2221400231 is about 1304.7949612050.

Adding to 2221400231 its reverse (1320041222), we get a palindrome (3541441453).

The spelling of 2221400231 in words is "two billion, two hundred twenty-one million, four hundred thousand, two hundred thirty-one".