167226721 has 16 divisors (see below), whose sum is σ = 178424064. Its totient is φ = 156397824.

The previous prime is 167226649. The next prime is 167226727. The reversal of 167226721 is 127622761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167226721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (167226727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229660 + ... + 230386.

It is an arithmetic number, because the mean of its divisors is an integer number (11151504).

Almost surely, 2^167226721 is an apocalyptic number.

It is an amenable number.

167226721 is a deficient number, since it is larger than the sum of its proper divisors (11197343).

167226721 is a wasteful number, since it uses less digits than its factorization.

167226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 14112, while the sum is 34.

The square root of 167226721 is about 12931.6171069205. The cubic root of 167226721 is about 550.9369385330.

The spelling of 167226721 in words is "one hundred sixty-seven million, two hundred twenty-six thousand, seven hundred twenty-one".