31220312043 has 8 divisors (see below), whose sum is σ = 41628038656. Its totient is φ = 20813063400.

The previous prime is 31220312041. The next prime is 31220312059. The reversal of 31220312043 is 34021302213.

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

It is not a de Polignac number, because 31220312043 - 2¹ = 31220312041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31220312041) 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, 80958 + ... + 262668.

It is an arithmetic number, because the mean of its divisors is an integer number (5203504832).

Almost surely, 2^31220312043 is an apocalyptic number.

31220312043 is a deficient number, since it is larger than the sum of its proper divisors (10407726613).

31220312043 is a wasteful number, since it uses less digits than its factorization.

31220312043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238985.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31220312043 its reverse (34021302213), we get a palindrome (65241614256).

The spelling of 31220312043 in words is "thirty-one billion, two hundred twenty million, three hundred twelve thousand, forty-three".