643031051 has 8 divisors (see below), whose sum is σ = 692764800. Its totient is φ = 593335872.

The previous prime is 643031021. The next prime is 643031063. The reversal of 643031051 is 150130346.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643031051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643031021) 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 7 ways as a sum of consecutive naturals, for example, 31526 + ... + 47748.

It is an arithmetic number, because the mean of its divisors is an integer number (86595600).

Almost surely, 2^643031051 is an apocalyptic number.

643031051 is a deficient number, since it is larger than the sum of its proper divisors (49733749).

643031051 is a wasteful number, since it uses less digits than its factorization.

643031051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 643031051 is about 25358.0569247724. The cubic root of 643031051 is about 863.1321925569.

Adding to 643031051 its reverse (150130346), we get a palindrome (793161397).

The spelling of 643031051 in words is "six hundred forty-three million, thirty-one thousand, fifty-one".