320121431 has 8 divisors (see below), whose sum is σ = 372756384. Its totient is φ = 269212320.

The previous prime is 320121413. The next prime is 320121457. The reversal of 320121431 is 134121023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320121431 is a prime.

It is a super-2 number, since 2×320121431² = 204955461170975522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431060 + ... + 431801.

It is an arithmetic number, because the mean of its divisors is an integer number (46594548).

Almost surely, 2^320121431 is an apocalyptic number.

320121431 is a deficient number, since it is larger than the sum of its proper divisors (52634953).

320121431 is an equidigital number, since it uses as much as digits as its factorization.

320121431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862921.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 320121431 is about 17891.9375977003. The cubic root of 320121431 is about 684.0768860997.

Adding to 320121431 its reverse (134121023), we get a palindrome (454242454).

The spelling of 320121431 in words is "three hundred twenty million, one hundred twenty-one thousand, four hundred thirty-one".