31481481201 has 4 divisors (see below), whose sum is σ = 41975308272. Its totient is φ = 20987654132.

The previous prime is 31481481179. The next prime is 31481481209. The reversal of 31481481201 is 10218418413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31481481201 - 2⁹ = 31481480689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31481481209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5246913531 + ... + 5246913536.

It is an arithmetic number, because the mean of its divisors is an integer number (10493827068).

Almost surely, 2^31481481201 is an apocalyptic number.

It is an amenable number.

31481481201 is a deficient number, since it is larger than the sum of its proper divisors (10493827071).

31481481201 is a wasteful number, since it uses less digits than its factorization.

31481481201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10493827070.

The product of its (nonzero) digits is 6144, while the sum is 33.

Adding to 31481481201 its reverse (10218418413), we get a palindrome (41699899614).

The spelling of 31481481201 in words is "thirty-one billion, four hundred eighty-one million, four hundred eighty-one thousand, two hundred one".