31404443231 has 8 divisors (see below), whose sum is σ = 35891977344. Its totient is φ = 26917205400.

The previous prime is 31404443209. The next prime is 31404443237. The reversal of 31404443231 is 13234440413.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31404443231 - 2¹⁴ = 31404426847 is a prime.

It is a super-2 number, since 2×31404443231² (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 = 31404443194 and 31404443203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404443237) 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 7 ways as a sum of consecutive naturals, for example, 244316 + ... + 349998.

It is an arithmetic number, because the mean of its divisors is an integer number (4486497168).

Almost surely, 2^31404443231 is an apocalyptic number.

31404443231 is a deficient number, since it is larger than the sum of its proper divisors (4487534113).

31404443231 is a wasteful number, since it uses less digits than its factorization.

31404443231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148141.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31404443231 its reverse (13234440413), we get a palindrome (44638883644).

The spelling of 31404443231 in words is "thirty-one billion, four hundred four million, four hundred forty-three thousand, two hundred thirty-one".