167521223 has 2 divisors, whose sum is σ = 167521224. Its totient is φ = 167521222.

The previous prime is 167521219. The next prime is 167521261. The reversal of 167521223 is 322125761.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (322125761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167521223 - 2² = 167521219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167521283) 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 as a sum of consecutive naturals, namely, 83760611 + 83760612.

It is an arithmetic number, because the mean of its divisors is an integer number (83760612).

Almost surely, 2^167521223 is an apocalyptic number.

167521223 is a deficient number, since it is larger than the sum of its proper divisors (1).

167521223 is an equidigital number, since it uses as much as digits as its factorization.

167521223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 167521223 is about 12942.9989955960. The cubic root of 167521223 is about 551.2601661355.

Adding to 167521223 its reverse (322125761), we get a palindrome (489646984).

The spelling of 167521223 in words is "one hundred sixty-seven million, five hundred twenty-one thousand, two hundred twenty-three".