31140201231 has 48 divisors (see below), whose sum is σ = 48845721600. Its totient is φ = 19042162944.

The previous prime is 31140201187. The next prime is 31140201271. The reversal of 31140201231 is 13210204113.

31140201231 is a `hidden beast` number, since 31 + 1 + 402 + 0 + 1 + 231 = 666.

It is not a de Polignac number, because 31140201231 - 2⁶ = 31140201167 is a prime.

It is a super-2 number, since 2×31140201231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140201271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1709590 + ... + 1727708.

It is an arithmetic number, because the mean of its divisors is an integer number (1017619200).

Almost surely, 2^31140201231 is an apocalyptic number.

31140201231 is a deficient number, since it is larger than the sum of its proper divisors (17705520369).

31140201231 is a wasteful number, since it uses less digits than its factorization.

31140201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18428 (or 18425 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31140201231 its reverse (13210204113), we get a palindrome (44350405344).

The spelling of 31140201231 in words is "thirty-one billion, one hundred forty million, two hundred one thousand, two hundred thirty-one".