1225530533 has 16 divisors (see below), whose sum is σ = 1333516800. Its totient is φ = 1121999040.

The previous prime is 1225530521. The next prime is 1225530557. The reversal of 1225530533 is 3350355221.

It is a cyclic number.

It is not a de Polignac number, because 1225530533 - 2⁶ = 1225530469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225530496 and 1225530505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225530133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723035 + ... + 724727.

It is an arithmetic number, because the mean of its divisors is an integer number (83344800).

Almost surely, 2^1225530533 is an apocalyptic number.

It is an amenable number.

1225530533 is a deficient number, since it is larger than the sum of its proper divisors (107986267).

1225530533 is a wasteful number, since it uses less digits than its factorization.

1225530533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972.

The product of its (nonzero) digits is 13500, while the sum is 29.

The square root of 1225530533 is about 35007.5782224364. The cubic root of 1225530533 is about 1070.1419245755.

Adding to 1225530533 its reverse (3350355221), we get a palindrome (4575885754).

The spelling of 1225530533 in words is "one billion, two hundred twenty-five million, five hundred thirty thousand, five hundred thirty-three".