1226011533 has 4 divisors (see below), whose sum is σ = 1634682048. Its totient is φ = 817341020.

The previous prime is 1226011531. The next prime is 1226011541. The reversal of 1226011533 is 3351106221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1226011533 - 2¹ = 1226011531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226011531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204335253 + ... + 204335258.

It is an arithmetic number, because the mean of its divisors is an integer number (408670512).

Almost surely, 2^1226011533 is an apocalyptic number.

It is an amenable number.

1226011533 is a deficient number, since it is larger than the sum of its proper divisors (408670515).

1226011533 is an equidigital number, since it uses as much as digits as its factorization.

1226011533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408670514.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1226011533 is about 35014.4474895721. The cubic root of 1226011533 is about 1070.2819104631.

Adding to 1226011533 its reverse (3351106221), we get a palindrome (4577117754).

The spelling of 1226011533 in words is "one billion, two hundred twenty-six million, eleven thousand, five hundred thirty-three".