31345420255 has 4 divisors (see below), whose sum is σ = 37614504312. Its totient is φ = 25076336200.

The previous prime is 31345420229. The next prime is 31345420273. The reversal of 31345420255 is 55202454313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31345420255 - 2²¹ = 31343323103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31345420255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134542021 + ... + 3134542030.

It is an arithmetic number, because the mean of its divisors is an integer number (9403626078).

Almost surely, 2^31345420255 is an apocalyptic number.

31345420255 is a deficient number, since it is larger than the sum of its proper divisors (6269084057).

31345420255 is an equidigital number, since it uses as much as digits as its factorization.

31345420255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269084056.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 31345420255 its reverse (55202454313), we get a palindrome (86547874568).

The spelling of 31345420255 in words is "thirty-one billion, three hundred forty-five million, four hundred twenty thousand, two hundred fifty-five".