2231212032 has 144 divisors (see below), whose sum is σ = 7365168720. Its totient is φ = 637452288.

The previous prime is 2231212021. The next prime is 2231212069. The reversal of 2231212032 is 2302121322.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×2231212032³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2231211996 and 2231212014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120378 + ... + 137670.

It is an arithmetic number, because the mean of its divisors is an integer number (51147005).

Almost surely, 2^2231212032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231212032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3682584360).

2231212032 is an abundant number, since it is smaller than the sum of its proper divisors (5133956688).

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

2231212032 is a wasteful number, since it uses less digits than its factorization.

2231212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17328 (or 17305 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2231212032 is about 47235.7071715879. The cubic root of 2231212032 is about 1306.7132085787.

Adding to 2231212032 its reverse (2302121322), we get a palindrome (4533333354).

The spelling of 2231212032 in words is "two billion, two hundred thirty-one million, two hundred twelve thousand, thirty-two".