226990581 has 16 divisors (see below), whose sum is σ = 305452224. Its totient is φ = 149935104.

The previous prime is 226990567. The next prime is 226990583. The reversal of 226990581 is 185099622.

It is not a de Polignac number, because 226990581 - 2¹³ = 226982389 is a prime.

It is a super-2 number, since 2×226990581² = 103049447725435122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226990583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177115 + ... + 178391.

It is an arithmetic number, because the mean of its divisors is an integer number (19090764).

Almost surely, 2^226990581 is an apocalyptic number.

It is an amenable number.

226990581 is a deficient number, since it is larger than the sum of its proper divisors (78461643).

226990581 is a wasteful number, since it uses less digits than its factorization.

226990581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 226990581 is about 15066.2065895832. The cubic root of 226990581 is about 610.0085826975.

The spelling of 226990581 in words is "two hundred twenty-six million, nine hundred ninety thousand, five hundred eighty-one".