7222157 has 6 divisors (see below), whose sum is σ = 7293258. Its totient is φ = 7151664.

The previous prime is 7222153. The next prime is 7222177. The reversal of 7222157 is 7512227.

It can be written as a sum of positive squares in 3 ways, for example, as 1394761 + 5827396 = 1181^2 + 2414^2 .

It is not a de Polignac number, because 7222157 - 2² = 7222153 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 (7222153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24503 + ... + 24795.

It is an arithmetic number, because the mean of its divisors is an integer number (1215543).

Almost surely, 2^7222157 is an apocalyptic number.

It is an amenable number.

7222157 is a deficient number, since it is larger than the sum of its proper divisors (71101).

7222157 is an equidigital number, since it uses as much as digits as its factorization.

7222157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 450 counting only the distinct ones).

The product of its digits is 1960, while the sum is 26.

The square root of 7222157 is about 2687.4071146739. The cubic root of 7222157 is about 193.2957513817.

It can be divided in two parts, 722215 and 7, that multiplied together give a palindrome (5055505).

The spelling of 7222157 in words is "seven million, two hundred twenty-two thousand, one hundred fifty-seven".