7225157 has 4 divisors (see below), whose sum is σ = 7282176. Its totient is φ = 7168140.

The previous prime is 7225133. The next prime is 7225177. The reversal of 7225157 is 7515227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7225157 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 (7225177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28319 + ... + 28572.

It is an arithmetic number, because the mean of its divisors is an integer number (1820544).

Almost surely, 2^7225157 is an apocalyptic number.

It is an amenable number.

7225157 is a deficient number, since it is larger than the sum of its proper divisors (57019).

7225157 is a wasteful number, since it uses less digits than its factorization.

7225157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57018.

The product of its digits is 4900, while the sum is 29.

The square root of 7225157 is about 2687.9652155487. The cubic root of 7225157 is about 193.3225119455.

The spelling of 7225157 in words is "seven million, two hundred twenty-five thousand, one hundred fifty-seven".