231133020 has 48 divisors (see below), whose sum is σ = 685244448. Its totient is φ = 58009600.

The previous prime is 231133009. The next prime is 231133039. The reversal of 231133020 is 20331132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112281 + ... + 114320.

It is an arithmetic number, because the mean of its divisors is an integer number (14275926).

Almost surely, 2^231133020 is an apocalyptic number.

231133020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231133020 is an abundant number, since it is smaller than the sum of its proper divisors (454111428).

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

231133020 is a wasteful number, since it uses less digits than its factorization.

231133020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226630 (or 226628 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 231133020 is about 15203.0595604964. The cubic root of 231133020 is about 613.6969967073.

Adding to 231133020 its reverse (20331132), we get a palindrome (251464152).

The spelling of 231133020 in words is "two hundred thirty-one million, one hundred thirty-three thousand, twenty".