222403381 has 2 divisors, whose sum is σ = 222403382. Its totient is φ = 222403380.

The previous prime is 222403373. The next prime is 222403403. The reversal of 222403381 is 183304222.

222403381 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., 144240100 + 78163281 = 12010^2 + 8841^2 .

It is a cyclic number.

It is not a de Polignac number, because 222403381 - 2³ = 222403373 is a prime.

It is a super-2 number, since 2×222403381² = 98926527760462322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222403081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111201690 + 111201691.

It is an arithmetic number, because the mean of its divisors is an integer number (111201691).

Almost surely, 2^222403381 is an apocalyptic number.

It is an amenable number.

222403381 is a deficient number, since it is larger than the sum of its proper divisors (1).

222403381 is an equidigital number, since it uses as much as digits as its factorization.

222403381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 222403381 is about 14913.1948622688. The cubic root of 222403381 is about 605.8714132441.

It can be divided in two parts, 222403 and 381, that added together give a square (222784 = 472²).

The spelling of 222403381 in words is "two hundred twenty-two million, four hundred three thousand, three hundred eighty-one".