168413522 has 4 divisors (see below), whose sum is σ = 252620286. Its totient is φ = 84206760.

The previous prime is 168413519. The next prime is 168413563. The reversal of 168413522 is 225314861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225314861 = 1033 ⋅218117.

It can be written as a sum of positive squares in only one way, i.e., 109599961 + 58813561 = 10469^2 + 7669^2 .

It is a super-2 number, since 2×168413522² = 56726228784888968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42103379 + ... + 42103382.

Almost surely, 2^168413522 is an apocalyptic number.

168413522 is a deficient number, since it is larger than the sum of its proper divisors (84206764).

168413522 is an equidigital number, since it uses as much as digits as its factorization.

168413522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84206763.

The product of its digits is 11520, while the sum is 32.

The square root of 168413522 is about 12977.4235501505. The cubic root of 168413522 is about 552.2371928378.

The spelling of 168413522 in words is "one hundred sixty-eight million, four hundred thirteen thousand, five hundred twenty-two".