228791851 has 2 divisors, whose sum is σ = 228791852. Its totient is φ = 228791850.

The previous prime is 228791807. The next prime is 228791867. The reversal of 228791851 is 158197822.

It is a happy number.

228791851 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 228791851 - 2²³ = 220403243 is a prime.

It is a super-2 number, since 2×228791851² = 104691422168012402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228791798 and 228791807.

It is not a weakly prime, because it can be changed into another prime (228791881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114395925 + 114395926.

It is an arithmetic number, because the mean of its divisors is an integer number (114395926).

Almost surely, 2^228791851 is an apocalyptic number.

228791851 is a deficient number, since it is larger than the sum of its proper divisors (1).

228791851 is an equidigital number, since it uses as much as digits as its factorization.

228791851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 228791851 is about 15125.8669503602. The cubic root of 228791851 is about 611.6178953541.

The spelling of 228791851 in words is "two hundred twenty-eight million, seven hundred ninety-one thousand, eight hundred fifty-one".