1226507533 has 4 divisors (see below), whose sum is σ = 1255031008. Its totient is φ = 1197984060.

The previous prime is 1226507531. The next prime is 1226507593. The reversal of 1226507533 is 3357056221.

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 1226507533 - 2¹ = 1226507531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226507531) 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, 14261673 + ... + 14261758.

It is an arithmetic number, because the mean of its divisors is an integer number (313757752).

Almost surely, 2^1226507533 is an apocalyptic number.

It is an amenable number.

1226507533 is a deficient number, since it is larger than the sum of its proper divisors (28523475).

1226507533 is an equidigital number, since it uses as much as digits as its factorization.

1226507533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28523474.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 1226507533 is about 35021.5295639696. The cubic root of 1226507533 is about 1070.4262234761.

The spelling of 1226507533 in words is "one billion, two hundred twenty-six million, five hundred seven thousand, five hundred thirty-three".