161224258 has 16 divisors (see below), whose sum is σ = 262193400. Its totient is φ = 73910016.

The previous prime is 161224183. The next prime is 161224267. The reversal of 161224258 is 852422161.

It can be written as a sum of positive squares in 4 ways, for example, as 134629609 + 26594649 = 11603^2 + 5157^2 .

It is a super-2 number, since 2×161224258² = 51986522735301128, 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 in 7 ways as a sum of consecutive naturals, for example, 16935 + ... + 24682.

Almost surely, 2^161224258 is an apocalyptic number.

161224258 is a deficient number, since it is larger than the sum of its proper divisors (100969142).

161224258 is a wasteful number, since it uses less digits than its factorization.

161224258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41781.

The product of its digits is 7680, while the sum is 31.

The square root of 161224258 is about 12697.4114684844. The cubic root of 161224258 is about 544.2646514512.

The spelling of 161224258 in words is "one hundred sixty-one million, two hundred twenty-four thousand, two hundred fifty-eight".