812305533 has 16 divisors (see below), whose sum is σ = 1182819456. Its totient is φ = 492838080.

The previous prime is 812305531. The next prime is 812305579. The reversal of 812305533 is 335503218.

It is not a de Polignac number, because 812305533 - 2¹ = 812305531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812305533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812305531) 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, 143910 + ... + 149447.

It is an arithmetic number, because the mean of its divisors is an integer number (73926216).

Almost surely, 2^812305533 is an apocalyptic number.

It is an amenable number.

812305533 is a deficient number, since it is larger than the sum of its proper divisors (370513923).

812305533 is a wasteful number, since it uses less digits than its factorization.

812305533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293444.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 812305533 is about 28500.9742465060. The cubic root of 812305533 is about 933.0533370849.

The spelling of 812305533 in words is "eight hundred twelve million, three hundred five thousand, five hundred thirty-three".