31243002401 has 4 divisors (see below), whose sum is σ = 33646310292. Its totient is φ = 28839694512.

The previous prime is 31243002391. The next prime is 31243002433. The reversal of 31243002401 is 10420034213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20563846801 + 10679155600 = 143401^2 + 103340^2 .

It is a cyclic number.

It is not a de Polignac number, because 31243002401 - 2¹⁴ = 31242986017 is a prime.

It is a super-2 number, since 2×31243002401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31243002001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201653926 + ... + 1201653951.

It is an arithmetic number, because the mean of its divisors is an integer number (8411577573).

Almost surely, 2^31243002401 is an apocalyptic number.

It is an amenable number.

31243002401 is a deficient number, since it is larger than the sum of its proper divisors (2403307891).

31243002401 is a wasteful number, since it uses less digits than its factorization.

31243002401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403307890.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31243002401 its reverse (10420034213), we get a palindrome (41663036614).

The spelling of 31243002401 in words is "thirty-one billion, two hundred forty-three million, two thousand, four hundred one".