167221457 has 8 divisors (see below), whose sum is σ = 180270720. Its totient is φ = 154198800.

The previous prime is 167221423. The next prime is 167221459. The reversal of 167221457 is 754122761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 167221457 - 2¹⁸ = 166959313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167221459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7544 + ... + 19782.

It is an arithmetic number, because the mean of its divisors is an integer number (22533840).

Almost surely, 2^167221457 is an apocalyptic number.

It is an amenable number.

167221457 is a deficient number, since it is larger than the sum of its proper divisors (13049263).

167221457 is a wasteful number, since it uses less digits than its factorization.

167221457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13303.

The product of its digits is 23520, while the sum is 35.

The square root of 167221457 is about 12931.4135731559. The cubic root of 167221457 is about 550.9311576338.

The spelling of 167221457 in words is "one hundred sixty-seven million, two hundred twenty-one thousand, four hundred fifty-seven".