7213922 has 4 divisors (see below), whose sum is σ = 10820886. Its totient is φ = 3606960.

The previous prime is 7213919. The next prime is 7213937. The reversal of 7213922 is 2293127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7070281 + 143641 = 2659^2 + 379^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7213891 and 7213900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1803479 + ... + 1803482.

Almost surely, 2^7213922 is an apocalyptic number.

7213922 is a deficient number, since it is larger than the sum of its proper divisors (3606964).

7213922 is a wasteful number, since it uses less digits than its factorization.

7213922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606963.

The product of its digits is 1512, while the sum is 26.

The square root of 7213922 is about 2685.8745316935. The cubic root of 7213922 is about 193.2222555224. Note that the first 4 decimals are identical.

The spelling of 7213922 in words is "seven million, two hundred thirteen thousand, nine hundred twenty-two".