228250391 has 2 divisors, whose sum is σ = 228250392. Its totient is φ = 228250390.

The previous prime is 228250331. The next prime is 228250411. The reversal of 228250391 is 193052822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228250391 - 2⁶ = 228250327 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228250331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114125195 + 114125196.

It is an arithmetic number, because the mean of its divisors is an integer number (114125196).

Almost surely, 2^228250391 is an apocalyptic number.

228250391 is a deficient number, since it is larger than the sum of its proper divisors (1).

228250391 is an equidigital number, since it uses as much as digits as its factorization.

228250391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 228250391 is about 15107.9578699439. The cubic root of 228250391 is about 611.1350281904.

The spelling of 228250391 in words is "two hundred twenty-eight million, two hundred fifty thousand, three hundred ninety-one".