226672991 has 4 divisors (see below), whose sum is σ = 226936512. Its totient is φ = 226409472.

The previous prime is 226672937. The next prime is 226673003. The reversal of 226672991 is 199276622.

226672991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199276622 = 2 ⋅99638311.

It is a cyclic number.

It is not a de Polignac number, because 226672991 - 2²² = 222478687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226672931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130466 + ... + 132191.

It is an arithmetic number, because the mean of its divisors is an integer number (56734128).

Almost surely, 2^226672991 is an apocalyptic number.

226672991 is a deficient number, since it is larger than the sum of its proper divisors (263521).

226672991 is an equidigital number, since it uses as much as digits as its factorization.

226672991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263520.

The product of its digits is 163296, while the sum is 44.

The square root of 226672991 is about 15055.6630873569. The cubic root of 226672991 is about 609.7239555442.

It can be divided in two parts, 2266 and 72991, that added together give a palindrome (75257).

The spelling of 226672991 in words is "two hundred twenty-six million, six hundred seventy-two thousand, nine hundred ninety-one".