31201440454431 has 96 divisors (see below), whose sum is σ = 52560831960000. Its totient is φ = 17670469386240.

The previous prime is 31201440454417. The next prime is 31201440454451. The reversal of 31201440454431 is 13445404410213.

It is a happy number.

31201440454431 is a `hidden beast` number, since 3 + 1 + 20 + 144 + 0 + 454 + 43 + 1 = 666.

It is not a de Polignac number, because 31201440454431 - 2¹¹ = 31201440452383 is a prime.

It is a super-2 number, since 2×31201440454431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201440454451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20501695 + ... + 21970943.

It is an arithmetic number, because the mean of its divisors is an integer number (547508666250).

Almost surely, 2^{31201440454431} is an apocalyptic number.

31201440454431 is a deficient number, since it is larger than the sum of its proper divisors (21359391505569).

31201440454431 is a wasteful number, since it uses less digits than its factorization.

31201440454431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469561 (or 1469558 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 31201440454431 its reverse (13445404410213), we get a palindrome (44646844864644).

The spelling of 31201440454431 in words is "thirty-one trillion, two hundred one billion, four hundred forty million, four hundred fifty-four thousand, four hundred thirty-one".