6440052231 has 16 divisors (see below), whose sum is σ = 9675198720. Its totient is φ = 4232896920.

The previous prime is 6440052209. The next prime is 6440052257. The reversal of 6440052231 is 1322500446.

It is not a de Polignac number, because 6440052231 - 2¹⁵ = 6440019463 is a prime.

It is a super-2 number, since 2×6440052231² = 82948545476016154722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 6440052195 and 6440052204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440059231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677805 + ... + 1681638.

It is an arithmetic number, because the mean of its divisors is an integer number (604699920).

Almost surely, 2^6440052231 is an apocalyptic number.

6440052231 is a deficient number, since it is larger than the sum of its proper divisors (3235146489).

6440052231 is a wasteful number, since it uses less digits than its factorization.

6440052231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359523 (or 3359517 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6440052231 is about 80249.9360186661. The cubic root of 6440052231 is about 1860.5005234663.

Adding to 6440052231 its reverse (1322500446), we get a palindrome (7762552677).

The spelling of 6440052231 in words is "six billion, four hundred forty million, fifty-two thousand, two hundred thirty-one".