226629781 has 8 divisors (see below), whose sum is σ = 259750400. Its totient is φ = 193695408.

The previous prime is 226629779. The next prime is 226629803. The reversal of 226629781 is 187926622.

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

It is a cyclic number.

It is not a de Polignac number, because 226629781 - 2¹ = 226629779 is a prime.

It is a super-2 number, since 2×226629781² = 102722115272215922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226629721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43941 + ... + 48826.

It is an arithmetic number, because the mean of its divisors is an integer number (32468800).

Almost surely, 2^226629781 is an apocalyptic number.

It is an amenable number.

226629781 is a deficient number, since it is larger than the sum of its proper divisors (33120619).

226629781 is an equidigital number, since it uses as much as digits as its factorization.

226629781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93123.

The product of its digits is 145152, while the sum is 43.

The square root of 226629781 is about 15054.2280107616. The cubic root of 226629781 is about 609.6852097924.

The spelling of 226629781 in words is "two hundred twenty-six million, six hundred twenty-nine thousand, seven hundred eighty-one".