503213644 has 12 divisors (see below), whose sum is σ = 895060768. Its totient is φ = 247482000.

The previous prime is 503213639. The next prime is 503213657. The reversal of 503213644 is 446312305.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030932 + ... + 1031419.

Almost surely, 2^503213644 is an apocalyptic number.

It is an amenable number.

503213644 is a deficient number, since it is larger than the sum of its proper divisors (391847124).

503213644 is a wasteful number, since it uses less digits than its factorization.

503213644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062416 (or 2062414 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 503213644 is about 22432.4239439255. The cubic root of 503213644 is about 795.3973431377.

Adding to 503213644 its reverse (446312305), we get a palindrome (949525949).

The spelling of 503213644 in words is "five hundred three million, two hundred thirteen thousand, six hundred forty-four".