1226420231 has 2 divisors, whose sum is σ = 1226420232. Its totient is φ = 1226420230.

The previous prime is 1226420219. The next prime is 1226420287. The reversal of 1226420231 is 1320246221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226420231 is a prime.

It is a super-2 number, since 2×1226420231² = 3008213166012186722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1226420197 and 1226420206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226420131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613210115 + 613210116.

It is an arithmetic number, because the mean of its divisors is an integer number (613210116).

Almost surely, 2^1226420231 is an apocalyptic number.

1226420231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226420231 is an equidigital number, since it uses as much as digits as its factorization.

1226420231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1226420231 is about 35020.2831370622. The cubic root of 1226420231 is about 1070.4008254618.

Adding to 1226420231 its reverse (1320246221), we get a palindrome (2546666452).

The spelling of 1226420231 in words is "one billion, two hundred twenty-six million, four hundred twenty thousand, two hundred thirty-one".