226997722987 has 4 divisors (see below), whose sum is σ = 259425969136. Its totient is φ = 194569476840.

The previous prime is 226997722979. The next prime is 226997722993. The reversal of 226997722987 is 789227799622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789227799622 = 2 ⋅394613899811.

It is a cyclic number.

It is not a de Polignac number, because 226997722987 - 2³ = 226997722979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (226997722937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16214123064 + ... + 16214123077.

It is an arithmetic number, because the mean of its divisors is an integer number (64856492284).

Almost surely, 2^226997722987 is an apocalyptic number.

226997722987 is a deficient number, since it is larger than the sum of its proper divisors (32428246149).

226997722987 is an equidigital number, since it uses as much as digits as its factorization.

226997722987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32428246148.

The product of its digits is 192036096, while the sum is 70.

The spelling of 226997722987 in words is "two hundred twenty-six billion, nine hundred ninety-seven million, seven hundred twenty-two thousand, nine hundred eighty-seven".