504219991 has 16 divisors (see below), whose sum is σ = 569318400. Its totient is φ = 442411200.

The previous prime is 504219971. The next prime is 504220037. The reversal of 504219991 is 199912405.

It is not a de Polignac number, because 504219991 - 2⁹ = 504219479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504219931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141115 + ... + 144643.

It is an arithmetic number, because the mean of its divisors is an integer number (35582400).

Almost surely, 2^504219991 is an apocalyptic number.

504219991 is a deficient number, since it is larger than the sum of its proper divisors (65098409).

504219991 is a wasteful number, since it uses less digits than its factorization.

504219991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 504219991 is about 22454.8433750939. The cubic root of 504219991 is about 795.9272126697.

The spelling of 504219991 in words is "five hundred four million, two hundred nineteen thousand, nine hundred ninety-one".