223948381 has 2 divisors, whose sum is σ = 223948382. Its totient is φ = 223948380.

The previous prime is 223948369. The next prime is 223948391. The reversal of 223948381 is 183849322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184144900 + 39803481 = 13570^2 + 6309^2 .

It is a cyclic number.

It is not a de Polignac number, because 223948381 - 2⁵ = 223948349 is a prime.

It is a super-2 number, since 2×223948381² = 100305754705042322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223948391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111974190 + 111974191.

It is an arithmetic number, because the mean of its divisors is an integer number (111974191).

Almost surely, 2^223948381 is an apocalyptic number.

It is an amenable number.

223948381 is a deficient number, since it is larger than the sum of its proper divisors (1).

223948381 is an equidigital number, since it uses as much as digits as its factorization.

223948381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 223948381 is about 14964.9049779810. The cubic root of 223948381 is about 607.2711402894.

The spelling of 223948381 in words is "two hundred twenty-three million, nine hundred forty-eight thousand, three hundred eighty-one".