1225533443 has 4 divisors (see below), whose sum is σ = 1232304528. Its totient is φ = 1218762360.

The previous prime is 1225533437. The next prime is 1225533473. The reversal of 1225533443 is 3443355221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225533443 - 2⁸ = 1225533187 is a prime.

It is a super-2 number, since 2×1225533443² = 3003864439822868498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225533433) 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, 3385271 + ... + 3385632.

It is an arithmetic number, because the mean of its divisors is an integer number (308076132).

Almost surely, 2^1225533443 is an apocalyptic number.

1225533443 is a deficient number, since it is larger than the sum of its proper divisors (6771085).

1225533443 is an equidigital number, since it uses as much as digits as its factorization.

1225533443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771084.

The product of its digits is 43200, while the sum is 32.

The square root of 1225533443 is about 35007.6197848411. The cubic root of 1225533443 is about 1070.1427715857.

Adding to 1225533443 its reverse (3443355221), we get a palindrome (4668888664).

The spelling of 1225533443 in words is "one billion, two hundred twenty-five million, five hundred thirty-three thousand, four hundred forty-three".