31220424201305 has 8 divisors (see below), whose sum is σ = 37507034028744. Its totient is φ = 24947989369600.

The previous prime is 31220424201277. The next prime is 31220424201313. The reversal of 31220424201305 is 50310242402213.

It can be written as a sum of positive squares in 4 ways, for example, as 797786589721 + 30422637611584 = 893189^2 + 5515672^2 .

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

It is not a de Polignac number, because 31220424201305 - 2²² = 31220420007001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3543744086 + ... + 3543752895.

It is an arithmetic number, because the mean of its divisors is an integer number (4688379253593).

Almost surely, 2^{31220424201305} is an apocalyptic number.

It is an amenable number.

31220424201305 is a deficient number, since it is larger than the sum of its proper divisors (6286609827439).

31220424201305 is an equidigital number, since it uses as much as digits as its factorization.

31220424201305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7087497867.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 31220424201305 its reverse (50310242402213), we get a palindrome (81530666603518).

The spelling of 31220424201305 in words is "thirty-one trillion, two hundred twenty billion, four hundred twenty-four million, two hundred one thousand, three hundred five".