133222391 has 2 divisors, whose sum is σ = 133222392. Its totient is φ = 133222390.

The previous prime is 133222321. The next prime is 133222403. The reversal of 133222391 is 193222331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133222391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133222391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133222301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66611195 + 66611196.

It is an arithmetic number, because the mean of its divisors is an integer number (66611196).

Almost surely, 2^133222391 is an apocalyptic number.

133222391 is a deficient number, since it is larger than the sum of its proper divisors (1).

133222391 is an equidigital number, since it uses as much as digits as its factorization.

133222391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 133222391 is about 11542.2004401241. The cubic root of 133222391 is about 510.7312220172.

The spelling of 133222391 in words is "one hundred thirty-three million, two hundred twenty-two thousand, three hundred ninety-one".