647212130 has 16 divisors (see below), whose sum is σ = 1176993720. Its totient is φ = 256215552.

The previous prime is 647212129. The next prime is 647212187. The reversal of 647212130 is 31212746.

It can be written as a sum of positive squares in 4 ways, for example, as 595213609 + 51998521 = 24397^2 + 7211^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 647212130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332645 + ... + 334584.

Almost surely, 2^647212130 is an apocalyptic number.

647212130 is a deficient number, since it is larger than the sum of its proper divisors (529781590).

647212130 is a wasteful number, since it uses less digits than its factorization.

647212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667333.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 647212130 is about 25440.3641876448. The cubic root of 647212130 is about 864.9988884791.

Adding to 647212130 its reverse (31212746), we get a palindrome (678424876).

The spelling of 647212130 in words is "six hundred forty-seven million, two hundred twelve thousand, one hundred thirty".