2131223232 has 28 divisors (see below), whose sum is σ = 5638861976. Its totient is φ = 710407680.

The previous prime is 2131223219. The next prime is 2131223239. The reversal of 2131223232 is 2323221312.

It is a happy number.

It is a super-2 number, since 2×2131223232² = 9084224929233051648, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2131223199 and 2131223208.

It is not an unprimeable number, because it can be changed into a prime (2131223239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5549869 + ... + 5550252.

Almost surely, 2^2131223232 is an apocalyptic number.

It is an amenable number.

2131223232 is an abundant number, since it is smaller than the sum of its proper divisors (3507638744).

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

2131223232 is a wasteful number, since it uses less digits than its factorization.

2131223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100136 (or 11100126 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 2131223232 is about 46165.1733669440. The cubic root of 2131223232 is about 1286.8946060356.

Adding to 2131223232 its reverse (2323221312), we get a palindrome (4454444544).

It can be divided in two parts, 21312 and 23232, that added together give a palindrome (44544).

The spelling of 2131223232 in words is "two billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-two".