223552891 has 2 divisors, whose sum is σ = 223552892. Its totient is φ = 223552890.

The previous prime is 223552837. The next prime is 223552913. The reversal of 223552891 is 198255322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223552891 - 2²⁷ = 89335163 is a prime.

It is equal to p_12307699 and since 223552891 and 12307699 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223552891.

It is not a weakly prime, because it can be changed into another prime (223552391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111776445 + 111776446.

It is an arithmetic number, because the mean of its divisors is an integer number (111776446).

Almost surely, 2^223552891 is an apocalyptic number.

223552891 is a deficient number, since it is larger than the sum of its proper divisors (1).

223552891 is an equidigital number, since it uses as much as digits as its factorization.

223552891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 223552891 is about 14951.6852227433. The cubic root of 223552891 is about 606.9134519389.

The spelling of 223552891 in words is "two hundred twenty-three million, five hundred fifty-two thousand, eight hundred ninety-one".