1222533491 has 2 divisors, whose sum is σ = 1222533492. Its totient is φ = 1222533490.

The previous prime is 1222533469. The next prime is 1222533503. The reversal of 1222533491 is 1943352221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222533491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222533691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611266745 + 611266746.

It is an arithmetic number, because the mean of its divisors is an integer number (611266746).

Almost surely, 2^1222533491 is an apocalyptic number.

1222533491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222533491 is an equidigital number, since it uses as much as digits as its factorization.

1222533491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 1222533491 is about 34964.7464026267. The cubic root of 1222533491 is about 1069.2688664119.

The spelling of 1222533491 in words is "one billion, two hundred twenty-two million, five hundred thirty-three thousand, four hundred ninety-one".