7213863 has 12 divisors (see below), whose sum is σ = 10152888. Its totient is φ = 4555440.

The previous prime is 7213861. The next prime is 7213897. The reversal of 7213863 is 3683127.

7213863 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7213863 - 2¹ = 7213861 is a prime.

7213863 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7213863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2248 + ... + 4413.

It is an arithmetic number, because the mean of its divisors is an integer number (846074).

Almost surely, 2^7213863 is an apocalyptic number.

7213863 is a deficient number, since it is larger than the sum of its proper divisors (2939025).

7213863 is a wasteful number, since it uses less digits than its factorization.

7213863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702 (or 6683 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 7213863 is about 2685.8635482839. The cubic root of 7213863 is about 193.2217287565.

The spelling of 7213863 in words is "seven million, two hundred thirteen thousand, eight hundred sixty-three".