228122731 has 2 divisors, whose sum is σ = 228122732. Its totient is φ = 228122730.

The previous prime is 228122693. The next prime is 228122749. The reversal of 228122731 is 137221822.

228122731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228122731 - 2⁷ = 228122603 is a prime.

It is a super-2 number, since 2×228122731² = 104079960797796722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228122731.

It is not a weakly prime, because it can be changed into another prime (228122771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114061365 + 114061366.

It is an arithmetic number, because the mean of its divisors is an integer number (114061366).

Almost surely, 2^228122731 is an apocalyptic number.

228122731 is a deficient number, since it is larger than the sum of its proper divisors (1).

228122731 is an equidigital number, since it uses as much as digits as its factorization.

228122731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 228122731 is about 15103.7323532960. The cubic root of 228122731 is about 611.0210713980.

Subtracting from 228122731 its reverse (137221822), we obtain a palindrome (90900909).

The spelling of 228122731 in words is "two hundred twenty-eight million, one hundred twenty-two thousand, seven hundred thirty-one".