226131491 has 2 divisors, whose sum is σ = 226131492. Its totient is φ = 226131490.

The previous prime is 226131463. The next prime is 226131517. The reversal of 226131491 is 194131622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226131491 is a prime.

It is a super-2 number, since 2×226131491² = 102270902443766162, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_12441656 and since 226131491 and 12441656 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (226131401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113065745 + 113065746.

It is an arithmetic number, because the mean of its divisors is an integer number (113065746).

Almost surely, 2^226131491 is an apocalyptic number.

226131491 is a deficient number, since it is larger than the sum of its proper divisors (1).

226131491 is an equidigital number, since it uses as much as digits as its factorization.

226131491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 226131491 is about 15037.6690680438. The cubic root of 226131491 is about 609.2380444215.

It can be divided in two parts, 226131 and 491, that added together give a palindrome (226622).

The spelling of 226131491 in words is "two hundred twenty-six million, one hundred thirty-one thousand, four hundred ninety-one".