2231219988 has 18 divisors (see below), whose sum is σ = 5640028394. Its totient is φ = 743739984.

The previous prime is 2231219957. The next prime is 2231219999. The reversal of 2231219988 is 8899121322.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2182945284 + 48274704 = 46722^2 + 6948^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×2231219988³ (a number of 29 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 30989131 + ... + 30989202.

Almost surely, 2^2231219988 is an apocalyptic number.

It is an amenable number.

2231219988 is an abundant number, since it is smaller than the sum of its proper divisors (3408808406).

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

2231219988 is a wasteful number, since it uses less digits than its factorization.

2231219988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61978343 (or 61978338 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 2231219988 is about 47235.7913874638. The cubic root of 2231219988 is about 1306.7147617253.

The spelling of 2231219988 in words is "two billion, two hundred thirty-one million, two hundred nineteen thousand, nine hundred eighty-eight".