31444431401 has 4 divisors (see below), whose sum is σ = 31453000704. Its totient is φ = 31435862100.

The previous prime is 31444431377. The next prime is 31444431419. The reversal of 31444431401 is 10413444413.

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 31444431401 - 2¹⁰ = 31444430377 is a prime.

It is a super-2 number, since 2×31444431401² (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 (31444430401) 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, 4279145 + ... + 4286486.

It is an arithmetic number, because the mean of its divisors is an integer number (7863250176).

Almost surely, 2^31444431401 is an apocalyptic number.

It is an amenable number.

31444431401 is a deficient number, since it is larger than the sum of its proper divisors (8569303).

31444431401 is an equidigital number, since it uses as much as digits as its factorization.

31444431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8569302.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31444431401 its reverse (10413444413), we get a palindrome (41857875814).

The spelling of 31444431401 in words is "thirty-one billion, four hundred forty-four million, four hundred thirty-one thousand, four hundred one".