320440451331 has 128 divisors (see below), whose sum is σ = 579985975296. Its totient is φ = 151971655680.

The previous prime is 320440451327. The next prime is 320440451341. The reversal of 320440451331 is 133154044023.

It is not a de Polignac number, because 320440451331 - 2² = 320440451327 is a prime.

It is a super-2 number, since 2×320440451331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320440451341) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 109851285 + ... + 109854201.

It is an arithmetic number, because the mean of its divisors is an integer number (4531140432).

Almost surely, 2^320440451331 is an apocalyptic number.

320440451331 is a deficient number, since it is larger than the sum of its proper divisors (259545523965).

320440451331 is a wasteful number, since it uses less digits than its factorization.

320440451331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 320440451331 its reverse (133154044023), we get a palindrome (453594495354).

The spelling of 320440451331 in words is "three hundred twenty billion, four hundred forty million, four hundred fifty-one thousand, three hundred thirty-one".