320551617 has 4 divisors (see below), whose sum is σ = 427402160. Its totient is φ = 213701076.

The previous prime is 320551601. The next prime is 320551631. The reversal of 320551617 is 716155023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716155023 = 3 ⋅238718341.

It is not a de Polignac number, because 320551617 - 2⁴ = 320551601 is a prime.

It is a super-2 number, since 2×320551617² = 205506678322629378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320551417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53425267 + ... + 53425272.

It is an arithmetic number, because the mean of its divisors is an integer number (106850540).

Almost surely, 2^320551617 is an apocalyptic number.

It is an amenable number.

320551617 is a deficient number, since it is larger than the sum of its proper divisors (106850543).

320551617 is a wasteful number, since it uses less digits than its factorization.

320551617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106850542.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 320551617 is about 17903.9553451186. The cubic root of 320551617 is about 684.3831746402.

The spelling of 320551617 in words is "three hundred twenty million, five hundred fifty-one thousand, six hundred seventeen".