2221255231 has 4 divisors (see below), whose sum is σ = 2392121032. Its totient is φ = 2050389432.

The previous prime is 2221255229. The next prime is 2221255277. The reversal of 2221255231 is 1325521222.

2221255231 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, and also an emirpimes, since its reverse is a distinct semiprime: 1325521222 = 2 ⋅662760611.

It is not a de Polignac number, because 2221255231 - 2¹ = 2221255229 is a prime.

It is a super-2 number, since 2×2221255231² = 9867949602489726722, 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 = 2221255196 and 2221255205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221255831) 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, 85432881 + ... + 85432906.

It is an arithmetic number, because the mean of its divisors is an integer number (598030258).

Almost surely, 2^2221255231 is an apocalyptic number.

2221255231 is a deficient number, since it is larger than the sum of its proper divisors (170865801).

2221255231 is a wasteful number, since it uses less digits than its factorization.

2221255231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170865800.

The product of its digits is 2400, while the sum is 25.

The square root of 2221255231 is about 47130.1944723338. The cubic root of 2221255231 is about 1304.7665707956.

Adding to 2221255231 its reverse (1325521222), we get a palindrome (3546776453).

The spelling of 2221255231 in words is "two billion, two hundred twenty-one million, two hundred fifty-five thousand, two hundred thirty-one".