226987691 has 8 divisors (see below), whose sum is σ = 263811840. Its totient is φ = 191262888.

The previous prime is 226987613. The next prime is 226987729. The reversal of 226987691 is 196789622.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226987691 is a prime.

It is a super-2 number, since 2×226987691² = 103046823731022962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226987601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274391 + ... + 275216.

It is an arithmetic number, because the mean of its divisors is an integer number (32976480).

Almost surely, 2^226987691 is an apocalyptic number.

226987691 is a deficient number, since it is larger than the sum of its proper divisors (36824149).

226987691 is an equidigital number, since it uses as much as digits as its factorization.

226987691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549673.

The product of its digits is 653184, while the sum is 50.

The square root of 226987691 is about 15066.1106792696. The cubic root of 226987691 is about 610.0059938496.

The spelling of 226987691 in words is "two hundred twenty-six million, nine hundred eighty-seven thousand, six hundred ninety-one".