226212491 has 2 divisors, whose sum is σ = 226212492. Its totient is φ = 226212490.

The previous prime is 226212479. The next prime is 226212509. The reversal of 226212491 is 194212622.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226212491 is a prime.

It is not a weakly prime, because it can be changed into another prime (226212401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113106245 + 113106246.

It is an arithmetic number, because the mean of its divisors is an integer number (113106246).

Almost surely, 2^226212491 is an apocalyptic number.

226212491 is a deficient number, since it is larger than the sum of its proper divisors (1).

226212491 is an equidigital number, since it uses as much as digits as its factorization.

226212491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 226212491 is about 15040.3620634611. The cubic root of 226212491 is about 609.3107784908.

The spelling of 226212491 in words is "two hundred twenty-six million, two hundred twelve thousand, four hundred ninety-one".