641224538 has 8 divisors (see below), whose sum is σ = 962804532. Its totient is φ = 320289696.

The previous prime is 641224531. The next prime is 641224601. The reversal of 641224538 is 835422146.

641224538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 499209649 + 142014889 = 22343^2 + 11917^2 .

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

It is a super-2 number, since 2×641224538² = 822337816266626888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641224498 and 641224507.

It is not an unprimeable number, because it can be changed into a prime (641224531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158795 + ... + 162782.

Almost surely, 2^641224538 is an apocalyptic number.

641224538 is a deficient number, since it is larger than the sum of its proper divisors (321579994).

641224538 is a wasteful number, since it uses less digits than its factorization.

641224538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322576.

The product of its digits is 46080, while the sum is 35.

The square root of 641224538 is about 25322.4117729730. The cubic root of 641224538 is about 862.3231481688.

The spelling of 641224538 in words is "six hundred forty-one million, two hundred twenty-four thousand, five hundred thirty-eight".