2231391745 has 16 divisors (see below), whose sum is σ = 3000045888. Its totient is φ = 1578968640.

The previous prime is 2231391727. The next prime is 2231391751. The reversal of 2231391745 is 5471931322.

It is not a de Polignac number, because 2231391745 - 2⁹ = 2231391233 is a prime.

It is a super-3 number, since 3×2231391745³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546219 + ... + 550288.

It is an arithmetic number, because the mean of its divisors is an integer number (187502868).

Almost surely, 2^2231391745 is an apocalyptic number.

It is an amenable number.

2231391745 is a deficient number, since it is larger than the sum of its proper divisors (768654143).

2231391745 is a wasteful number, since it uses less digits than its factorization.

2231391745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096560.

The product of its digits is 45360, while the sum is 37.

The square root of 2231391745 is about 47237.6094335859. The cubic root of 2231391745 is about 1306.7482907139.

The spelling of 2231391745 in words is "two billion, two hundred thirty-one million, three hundred ninety-one thousand, seven hundred forty-five".