31421443201 has 4 divisors (see below), whose sum is σ = 31534878292. Its totient is φ = 31308008112.

The previous prime is 31421443187. The next prime is 31421443219. The reversal of 31421443201 is 10234412413.

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 18977817600 + 12443625601 = 137760^2 + 111551^2 .

It is a cyclic number.

It is not a de Polignac number, because 31421443201 - 2¹⁷ = 31421312129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421443271) 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, 56717130 + ... + 56717683.

It is an arithmetic number, because the mean of its divisors is an integer number (7883719573).

Almost surely, 2^31421443201 is an apocalyptic number.

It is an amenable number.

31421443201 is a deficient number, since it is larger than the sum of its proper divisors (113435091).

31421443201 is a wasteful number, since it uses less digits than its factorization.

31421443201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113435090.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31421443201 its reverse (10234412413), we get a palindrome (41655855614).

The spelling of 31421443201 in words is "thirty-one billion, four hundred twenty-one million, four hundred forty-three thousand, two hundred one".