31320401343 has 32 divisors (see below), whose sum is σ = 52250476032. Its totient is φ = 16212403200.

The previous prime is 31320401243. The next prime is 31320401377. The reversal of 31320401343 is 34310402313.

It is not a de Polignac number, because 31320401343 - 2¹³ = 31320393151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320401243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176346 + ... + 306167.

It is an arithmetic number, because the mean of its divisors is an integer number (1632827376).

Almost surely, 2^31320401343 is an apocalyptic number.

31320401343 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31320401343 is a deficient number, since it is larger than the sum of its proper divisors (20930074689).

31320401343 is a wasteful number, since it uses less digits than its factorization.

31320401343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482815.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31320401343 its reverse (34310402313), we get a palindrome (65630803656).

The spelling of 31320401343 in words is "thirty-one billion, three hundred twenty million, four hundred one thousand, three hundred forty-three".