2220031381 has 2 divisors, whose sum is σ = 2220031382. Its totient is φ = 2220031380.

The previous prime is 2220031357. The next prime is 2220031439. The reversal of 2220031381 is 1831300222.

2220031381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1865462481 + 354568900 = 43191^2 + 18830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220031381 - 2⁵ = 2220031349 is a prime.

It is a super-2 number, since 2×2220031381² = 9857078665249534322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220031301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110015690 + 1110015691.

It is an arithmetic number, because the mean of its divisors is an integer number (1110015691).

Almost surely, 2^2220031381 is an apocalyptic number.

It is an amenable number.

2220031381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220031381 is an equidigital number, since it uses as much as digits as its factorization.

2220031381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2220031381 is about 47117.2089686985. The cubic root of 2220031381 is about 1304.5268967131.

The spelling of 2220031381 in words is "two billion, two hundred twenty million, thirty-one thousand, three hundred eighty-one".