234225991 has 2 divisors, whose sum is σ = 234225992. Its totient is φ = 234225990.

The previous prime is 234225941. The next prime is 234226001. The reversal of 234225991 is 199522432.

234225991 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 a de Polignac number, because none of the positive numbers 2^k-234225991 is a prime.

It is a Chen prime.

It is equal to p_12861784 and since 234225991 and 12861784 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 234225991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234225941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117112995 + 117112996.

It is an arithmetic number, because the mean of its divisors is an integer number (117112996).

Almost surely, 2^234225991 is an apocalyptic number.

234225991 is a deficient number, since it is larger than the sum of its proper divisors (1).

234225991 is an equidigital number, since it uses as much as digits as its factorization.

234225991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 234225991 is about 15304.4435050739. The cubic root of 234225991 is about 616.4223285553.

The spelling of 234225991 in words is "two hundred thirty-four million, two hundred twenty-five thousand, nine hundred ninety-one".