2145304331 has 8 divisors (see below), whose sum is σ = 2193006144. Its totient is φ = 2097688320.

The previous prime is 2145304313. The next prime is 2145304333. The reversal of 2145304331 is 1334035412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145304331 is a prime.

It is a super-2 number, since 2×2145304331² = 9204661345214715122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145304331.

It is not an unprimeable number, because it can be changed into a prime (2145304333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30491 + ... + 72251.

It is an arithmetic number, because the mean of its divisors is an integer number (274125768).

Almost surely, 2^2145304331 is an apocalyptic number.

2145304331 is a deficient number, since it is larger than the sum of its proper divisors (47701813).

2145304331 is a wasteful number, since it uses less digits than its factorization.

2145304331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42901.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2145304331 is about 46317.4300992618. The cubic root of 2145304331 is about 1289.7225794078.

Adding to 2145304331 its reverse (1334035412), we get a palindrome (3479339743).

The spelling of 2145304331 in words is "two billion, one hundred forty-five million, three hundred four thousand, three hundred thirty-one".