33231213820 has 48 divisors (see below), whose sum is σ = 79786542528. Its totient is φ = 11389040640.

The previous prime is 33231213803. The next prime is 33231213823. The reversal of 33231213820 is 2831213233.

It is a super-2 number, since 2×33231213820² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231213823) 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, 317250 + ... + 408790.

It is an arithmetic number, because the mean of its divisors is an integer number (1662219636).

Almost surely, 2^33231213820 is an apocalyptic number.

It is an amenable number.

33231213820 is an abundant number, since it is smaller than the sum of its proper divisors (46555328708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33231213820 is a wasteful number, since it uses less digits than its factorization.

33231213820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94150 (or 94148 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 33231213820 in words is "thirty-three billion, two hundred thirty-one million, two hundred thirteen thousand, eight hundred twenty".