226815997 has 2 divisors, whose sum is σ = 226815998. Its totient is φ = 226815996.

The previous prime is 226815983. The next prime is 226816033. The reversal of 226815997 is 799518622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224220676 + 2595321 = 14974^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 226815997 - 2¹⁵ = 226783229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 226815997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226815907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113407998 + 113407999.

It is an arithmetic number, because the mean of its divisors is an integer number (113407999).

Almost surely, 2^226815997 is an apocalyptic number.

It is an amenable number.

226815997 is a deficient number, since it is larger than the sum of its proper divisors (1).

226815997 is an equidigital number, since it uses as much as digits as its factorization.

226815997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 226815997 is about 15060.4115813612. The cubic root of 226815997 is about 609.8521517523.

The spelling of 226815997 in words is "two hundred twenty-six million, eight hundred fifteen thousand, nine hundred ninety-seven".