226929621 has 8 divisors (see below), whose sum is σ = 310750624. Its totient is φ = 147197520.

The previous prime is 226929613. The next prime is 226929643. The reversal of 226929621 is 126929622.

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

It is not a de Polignac number, because 226929621 - 2³ = 226929613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 226929621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226929601) 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, 1022095 + ... + 1022316.

It is an arithmetic number, because the mean of its divisors is an integer number (38843828).

Almost surely, 2^226929621 is an apocalyptic number.

It is an amenable number.

226929621 is a deficient number, since it is larger than the sum of its proper divisors (83821003).

226929621 is a wasteful number, since it uses less digits than its factorization.

226929621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044451.

The product of its digits is 46656, while the sum is 39.

The square root of 226929621 is about 15064.1833831111. The cubic root of 226929621 is about 609.9539703689.

Subtracting from 226929621 its reverse (126929622), we obtain a palindrome (99999999).

The spelling of 226929621 in words is "two hundred twenty-six million, nine hundred twenty-nine thousand, six hundred twenty-one".