320253655 has 4 divisors (see below), whose sum is σ = 384304392. Its totient is φ = 256202920.

The previous prime is 320253649. The next prime is 320253671. The reversal of 320253655 is 556352023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556352023 = 109 ⋅5104147.

It is a de Polignac number, because none of the positive numbers 2^k-320253655 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32025361 + ... + 32025370.

It is an arithmetic number, because the mean of its divisors is an integer number (96076098).

Almost surely, 2^320253655 is an apocalyptic number.

320253655 is a deficient number, since it is larger than the sum of its proper divisors (64050737).

320253655 is an equidigital number, since it uses as much as digits as its factorization.

320253655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64050736.

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 320253655 is about 17895.6322883546. The cubic root of 320253655 is about 684.1710575847.

The spelling of 320253655 in words is "three hundred twenty million, two hundred fifty-three thousand, six hundred fifty-five".