320214551 has 4 divisors (see below), whose sum is σ = 328024704. Its totient is φ = 312404400.

The previous prime is 320214529. The next prime is 320214553. The reversal of 320214551 is 155412023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155412023 = 13 ⋅11954771.

It is a cyclic number.

It is not a de Polignac number, because 320214551 - 2¹⁰ = 320213527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320214553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905015 + ... + 3905096.

It is an arithmetic number, because the mean of its divisors is an integer number (82006176).

Almost surely, 2^320214551 is an apocalyptic number.

320214551 is a deficient number, since it is larger than the sum of its proper divisors (7810153).

320214551 is an equidigital number, since it uses as much as digits as its factorization.

320214551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810152.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 320214551 is about 17894.5396979079. The cubic root of 320214551 is about 684.1432099566.

Adding to 320214551 its reverse (155412023), we get a palindrome (475626574).

The spelling of 320214551 in words is "three hundred twenty million, two hundred fourteen thousand, five hundred fifty-one".