2232501991 has 4 divisors (see below), whose sum is σ = 2237086672. Its totient is φ = 2227917312.

The previous prime is 2232501979. The next prime is 2232502009. The reversal of 2232501991 is 1991052322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2232501991 - 2¹⁹ = 2231977703 is a prime.

It is a super-3 number, since 3×2232501991³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2232501911) 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, 2291610 + ... + 2292583.

It is an arithmetic number, because the mean of its divisors is an integer number (559271668).

Almost surely, 2^2232501991 is an apocalyptic number.

2232501991 is a deficient number, since it is larger than the sum of its proper divisors (4584681).

2232501991 is an equidigital number, since it uses as much as digits as its factorization.

2232501991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584680.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2232501991 is about 47249.3596887831. The cubic root of 2232501991 is about 1306.9649823088.

The spelling of 2232501991 in words is "two billion, two hundred thirty-two million, five hundred one thousand, nine hundred ninety-one".