320251601 has 2 divisors, whose sum is σ = 320251602. Its totient is φ = 320251600.

The previous prime is 320251597. The next prime is 320251619. The reversal of 320251601 is 106152023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219750976 + 100500625 = 14824^2 + 10025^2 .

It is an emirp because it is prime and its reverse (106152023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320251601 - 2² = 320251597 is a prime.

It is a super-2 number, since 2×320251601² = 205122175886126402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320251651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160125800 + 160125801.

It is an arithmetic number, because the mean of its divisors is an integer number (160125801).

Almost surely, 2^320251601 is an apocalyptic number.

It is an amenable number.

320251601 is a deficient number, since it is larger than the sum of its proper divisors (1).

320251601 is an equidigital number, since it uses as much as digits as its factorization.

320251601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 320251601 is about 17895.5748999578. The cubic root of 320251601 is about 684.1695949000.

The spelling of 320251601 in words is "three hundred twenty million, two hundred fifty-one thousand, six hundred one".