2031312220645 has 8 divisors (see below), whose sum is σ = 2437964901504. Its totient is φ = 1624789618704.

The previous prime is 2031312220621. The next prime is 2031312220673. The reversal of 2031312220645 is 5460222131302.

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

It is a cyclic number.

It is not a de Polignac number, because 2031312220645 - 2¹³ = 2031312212453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32485369 + ... + 32547838.

It is an arithmetic number, because the mean of its divisors is an integer number (304745612688).

Almost surely, 2^{2031312220645} is an apocalyptic number.

It is an amenable number.

2031312220645 is a deficient number, since it is larger than the sum of its proper divisors (406652680859).

2031312220645 is an equidigital number, since it uses as much as digits as its factorization.

2031312220645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65039459.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 2031312220645 its reverse (5460222131302), we get a palindrome (7491534351947).

The spelling of 2031312220645 in words is "two trillion, thirty-one billion, three hundred twelve million, two hundred twenty thousand, six hundred forty-five".