2291772387 has 8 divisors (see below), whose sum is σ = 3056112640. Its totient is φ = 1527640200.

The previous prime is 2291772377. The next prime is 2291772391. The reversal of 2291772387 is 7832771922.

2291772387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2291772387 - 2³⁰ = 1218030563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291772337) 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, 24187 + ... + 71892.

It is an arithmetic number, because the mean of its divisors is an integer number (382014080).

Almost surely, 2^2291772387 is an apocalyptic number.

2291772387 is a deficient number, since it is larger than the sum of its proper divisors (764340253).

2291772387 is an equidigital number, since it uses as much as digits as its factorization.

2291772387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104033.

The product of its digits is 592704, while the sum is 48.

The square root of 2291772387 is about 47872.4595879510. The cubic root of 2291772387 is about 1318.4302557859.

The spelling of 2291772387 in words is "two billion, two hundred ninety-one million, seven hundred seventy-two thousand, three hundred eighty-seven".