2131233320 has 32 divisors (see below), whose sum is σ = 4842762120. Its totient is φ = 844051200.

The previous prime is 2131233301. The next prime is 2131233329. The reversal of 2131233320 is 233321312.

It can be written as a sum of positive squares in 4 ways, for example, as 2019423844 + 111809476 = 44938^2 + 10574^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2131233292 and 2131233301.

It is not an unprimeable number, because it can be changed into a prime (2131233329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259727 + ... + 267806.

Almost surely, 2^2131233320 is an apocalyptic number.

2131233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131233320 is an abundant number, since it is smaller than the sum of its proper divisors (2711528800).

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

2131233320 is a wasteful number, since it uses less digits than its factorization.

2131233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527645 (or 527641 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 2131233320 is about 46165.2826266665. The cubic root of 2131233320 is about 1286.8966365084.

Adding to 2131233320 its reverse (233321312), we get a palindrome (2364554632).

The spelling of 2131233320 in words is "two billion, one hundred thirty-one million, two hundred thirty-three thousand, three hundred twenty".