31404255443 has 4 divisors (see below), whose sum is σ = 34259187768. Its totient is φ = 28549323120.

The previous prime is 31404255439. The next prime is 31404255461. The reversal of 31404255443 is 34455240413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31404255443 - 2² = 31404255439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31404251443) 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, 1427466146 + ... + 1427466167.

It is an arithmetic number, because the mean of its divisors is an integer number (8564796942).

Almost surely, 2^31404255443 is an apocalyptic number.

31404255443 is a deficient number, since it is larger than the sum of its proper divisors (2854932325).

31404255443 is a wasteful number, since it uses less digits than its factorization.

31404255443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854932324.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 31404255443 its reverse (34455240413), we get a palindrome (65859495856).

The spelling of 31404255443 in words is "thirty-one billion, four hundred four million, two hundred fifty-five thousand, four hundred forty-three".