31430400002 has 12 divisors (see below), whose sum is σ = 48323544018. Its totient is φ = 15331900800.

The previous prime is 31430399993. The next prime is 31430400017. The reversal of 31430400002 is 20000403413.

It can be written as a sum of positive squares in 3 ways, for example, as 2230767361 + 29199632641 = 47231^2 + 170879^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4670999 + ... + 4677722.

Almost surely, 2^31430400002 is an apocalyptic number.

31430400002 is a deficient number, since it is larger than the sum of its proper divisors (16893144016).

31430400002 is an equidigital number, since it uses as much as digits as its factorization.

31430400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348805 (or 9348764 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 31430400002 its reverse (20000403413), we get a palindrome (51430803415).

The spelling of 31430400002 in words is "thirty-one billion, four hundred thirty million, four hundred thousand, two".