320402451 has 12 divisors (see below), whose sum is σ = 453812312. Its totient is φ = 201036288.

The previous prime is 320402441. The next prime is 320402461. The reversal of 320402451 is 154204023.

It is an interprime number because it is at equal distance from previous prime (320402441) and next prime (320402461).

It is not a de Polignac number, because 320402451 - 2⁵ = 320402419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320402441) 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 11 ways as a sum of consecutive naturals, for example, 183910 + ... + 185643.

Almost surely, 2^320402451 is an apocalyptic number.

320402451 is a deficient number, since it is larger than the sum of its proper divisors (133409861).

320402451 is a wasteful number, since it uses less digits than its factorization.

320402451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369590 (or 369573 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 320402451 is about 17899.7891328362. The cubic root of 320402451 is about 684.2770008506.

Adding to 320402451 its reverse (154204023), we get a palindrome (474606474).

The spelling of 320402451 in words is "three hundred twenty million, four hundred two thousand, four hundred fifty-one".