6420231530 has 32 divisors (see below), whose sum is σ = 11884752000. Its totient is φ = 2495731392.

The previous prime is 6420231511. The next prime is 6420231547. The reversal of 6420231530 is 351320246.

It is a super-2 number, since 2×6420231530² = 82438745797612281800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6420231530.

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, 48056 + ... + 123084.

It is an arithmetic number, because the mean of its divisors is an integer number (371398500).

Almost surely, 2^6420231530 is an apocalyptic number.

6420231530 is a deficient number, since it is larger than the sum of its proper divisors (5464520470).

6420231530 is a wasteful number, since it uses less digits than its factorization.

6420231530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75278.

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

The square root of 6420231530 is about 80126.3472897648. The cubic root of 6420231530 is about 1858.5898598104.

Adding to 6420231530 its reverse (351320246), we get a palindrome (6771551776).

The spelling of 6420231530 in words is "six billion, four hundred twenty million, two hundred thirty-one thousand, five hundred thirty".