648204331 has 12 divisors (see below), whose sum is σ = 679747600. Its totient is φ = 618068880.

The previous prime is 648204329. The next prime is 648204367. The reversal of 648204331 is 133402846.

It is not a de Polignac number, because 648204331 - 2¹ = 648204329 is a prime.

It is a super-2 number, since 2×648204331² = 840337709454315122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648204293 and 648204302.

It is not an unprimeable number, because it can be changed into a prime (648204371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182866 + ... + 186376.

Almost surely, 2^648204331 is an apocalyptic number.

648204331 is a deficient number, since it is larger than the sum of its proper divisors (31543269).

648204331 is a wasteful number, since it uses less digits than its factorization.

648204331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906 (or 3883 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 648204331 is about 25459.8572462612. The cubic root of 648204331 is about 865.4406882731.

The spelling of 648204331 in words is "six hundred forty-eight million, two hundred four thousand, three hundred thirty-one".