1226131481 has 4 divisors (see below), whose sum is σ = 1227625764. Its totient is φ = 1224637200.

The previous prime is 1226131453. The next prime is 1226131483. The reversal of 1226131481 is 1841316221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 362712025 + 863419456 = 19045^2 + 29384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226131481 is a prime.

It is a super-2 number, since 2×1226131481² = 3006796817398506722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226131483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745910 + ... + 747551.

It is an arithmetic number, because the mean of its divisors is an integer number (306906441).

Almost surely, 2^1226131481 is an apocalyptic number.

It is an amenable number.

1226131481 is a deficient number, since it is larger than the sum of its proper divisors (1494283).

1226131481 is an equidigital number, since it uses as much as digits as its factorization.

1226131481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494282.

The product of its digits is 2304, while the sum is 29.

The square root of 1226131481 is about 35016.1602835034. The cubic root of 1226131481 is about 1070.3168133398.

The spelling of 1226131481 in words is "one billion, two hundred twenty-six million, one hundred thirty-one thousand, four hundred eighty-one".