320252161 has 8 divisors (see below), whose sum is σ = 339165504. Its totient is φ = 301754640.

The previous prime is 320252147. The next prime is 320252197. The reversal of 320252161 is 161252023.

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 320252161 - 2⁷ = 320252033 is a prime.

It is a super-2 number, since 2×320252161² = 205122893250339842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320252861) by changing a digit.

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, 102370 + ... + 105451.

It is an arithmetic number, because the mean of its divisors is an integer number (42395688).

Almost surely, 2^320252161 is an apocalyptic number.

It is an amenable number.

320252161 is a deficient number, since it is larger than the sum of its proper divisors (18913343).

320252161 is a wasteful number, since it uses less digits than its factorization.

320252161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207911.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 320252161 is about 17895.5905462770. The cubic root of 320252161 is about 684.1699936852.

The spelling of 320252161 in words is "three hundred twenty million, two hundred fifty-two thousand, one hundred sixty-one".