227493991 has 2 divisors, whose sum is σ = 227493992. Its totient is φ = 227493990.

The previous prime is 227493961. The next prime is 227493997. The reversal of 227493991 is 199394722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 227493991 - 2⁷ = 227493863 is a prime.

It is a super-2 number, since 2×227493991² = 103507031882216162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227493997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113746995 + 113746996.

It is an arithmetic number, because the mean of its divisors is an integer number (113746996).

Almost surely, 2^227493991 is an apocalyptic number.

227493991 is a deficient number, since it is larger than the sum of its proper divisors (1).

227493991 is an equidigital number, since it uses as much as digits as its factorization.

227493991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 227493991 is about 15082.9039312727. The cubic root of 227493991 is about 610.4592000545.

It can be divided in two parts, 227493 and 991, that added together give a square (228484 = 478²).

The spelling of 227493991 in words is "two hundred twenty-seven million, four hundred ninety-three thousand, nine hundred ninety-one".