31571450401 has 4 divisors (see below), whose sum is σ = 31603568832. Its totient is φ = 31539331972.

The previous prime is 31571450321. The next prime is 31571450419. The reversal of 31571450401 is 10405417513.

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 31571450401 - 2¹⁹ = 31570926113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31571454401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16057741 + ... + 16059706.

It is an arithmetic number, because the mean of its divisors is an integer number (7900892208).

Almost surely, 2^31571450401 is an apocalyptic number.

It is an amenable number.

31571450401 is a deficient number, since it is larger than the sum of its proper divisors (32118431).

31571450401 is an equidigital number, since it uses as much as digits as its factorization.

31571450401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32118430.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 31571450401 its reverse (10405417513), we get a palindrome (41976867914).

The spelling of 31571450401 in words is "thirty-one billion, five hundred seventy-one million, four hundred fifty thousand, four hundred one".