7922155 has 4 divisors (see below), whose sum is σ = 9506592. Its totient is φ = 6337720.

The previous prime is 7922149. The next prime is 7922171. The reversal of 7922155 is 5512297.

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

It is not a de Polignac number, because 7922155 - 2¹⁹ = 7397867 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792211 + ... + 792220.

It is an arithmetic number, because the mean of its divisors is an integer number (2376648).

Almost surely, 2^7922155 is an apocalyptic number.

7922155 is a deficient number, since it is larger than the sum of its proper divisors (1584437).

7922155 is a wasteful number, since it uses less digits than its factorization.

7922155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584436.

The product of its digits is 6300, while the sum is 31.

The square root of 7922155 is about 2814.6323028062. The cubic root of 7922155 is about 199.3491761052.

The spelling of 7922155 in words is "seven million, nine hundred twenty-two thousand, one hundred fifty-five".