2221730831 has 2 divisors, whose sum is σ = 2221730832. Its totient is φ = 2221730830.

The previous prime is 2221730827. The next prime is 2221730869. The reversal of 2221730831 is 1380371222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221730831 - 2² = 2221730827 is a prime.

It is a super-2 number, since 2×2221730831² = 9872175770831901122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221730794 and 2221730803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221730821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110865415 + 1110865416.

It is an arithmetic number, because the mean of its divisors is an integer number (1110865416).

Almost surely, 2^2221730831 is an apocalyptic number.

2221730831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221730831 is an equidigital number, since it uses as much as digits as its factorization.

2221730831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2221730831 is about 47135.2397999628. The cubic root of 2221730831 is about 1304.8596867192.

The spelling of 2221730831 in words is "two billion, two hundred twenty-one million, seven hundred thirty thousand, eight hundred thirty-one".