320352551 has 2 divisors, whose sum is σ = 320352552. Its totient is φ = 320352550.

The previous prime is 320352523. The next prime is 320352569. The reversal of 320352551 is 155253023.

It is a strong prime.

It is an emirp because it is prime and its reverse (155253023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320352551 - 2²⁶ = 253243687 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320352551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320352581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160176275 + 160176276.

It is an arithmetic number, because the mean of its divisors is an integer number (160176276).

Almost surely, 2^320352551 is an apocalyptic number.

320352551 is a deficient number, since it is larger than the sum of its proper divisors (1).

320352551 is an equidigital number, since it uses as much as digits as its factorization.

320352551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 320352551 is about 17898.3952073922. The cubic root of 320352551 is about 684.2414755344.

The spelling of 320352551 in words is "three hundred twenty million, three hundred fifty-two thousand, five hundred fifty-one".