84522157 has 2 divisors, whose sum is σ = 84522158. Its totient is φ = 84522156.

The previous prime is 84522131. The next prime is 84522167. The reversal of 84522157 is 75122548.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72488196 + 12033961 = 8514^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 84522157 - 2⁷ = 84522029 is a prime.

It is equal to p_4917652 and since 84522157 and 4917652 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84522107) 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 as a sum of consecutive naturals, namely, 42261078 + 42261079.

It is an arithmetic number, because the mean of its divisors is an integer number (42261079).

Almost surely, 2^84522157 is an apocalyptic number.

It is an amenable number.

84522157 is a deficient number, since it is larger than the sum of its proper divisors (1).

84522157 is an equidigital number, since it uses as much as digits as its factorization.

84522157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 34.

The square root of 84522157 is about 9193.5932583512. The cubic root of 84522157 is about 438.8574991122.

It can be divided in two parts, 8452 and 2157, that added together give a square (10609 = 103²).

The spelling of 84522157 in words is "eighty-four million, five hundred twenty-two thousand, one hundred fifty-seven".