31440201231 has 8 divisors (see below), whose sum is σ = 41926365184. Its totient is φ = 20957085720.

The previous prime is 31440201229. The next prime is 31440201281. The reversal of 31440201231 is 13210204413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31440201231 - 2¹ = 31440201229 is a prime.

It is a super-2 number, since 2×31440201231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31440201198 and 31440201207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440201281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737935 + ... + 779376.

It is an arithmetic number, because the mean of its divisors is an integer number (5240795648).

Almost surely, 2^31440201231 is an apocalyptic number.

31440201231 is a deficient number, since it is larger than the sum of its proper divisors (10486163953).

31440201231 is a wasteful number, since it uses less digits than its factorization.

31440201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524221.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31440201231 its reverse (13210204413), we get a palindrome (44650405644).

The spelling of 31440201231 in words is "thirty-one billion, four hundred forty million, two hundred one thousand, two hundred thirty-one".