31404421141 has 4 divisors (see below), whose sum is σ = 31697920512. Its totient is φ = 31110921772.

The previous prime is 31404421127. The next prime is 31404421159. The reversal of 31404421141 is 14112440413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14112440413 = 67 ⋅210633439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31404421141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404421171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146749525 + ... + 146749738.

It is an arithmetic number, because the mean of its divisors is an integer number (7924480128).

Almost surely, 2^31404421141 is an apocalyptic number.

It is an amenable number.

31404421141 is a deficient number, since it is larger than the sum of its proper divisors (293499371).

31404421141 is a wasteful number, since it uses less digits than its factorization.

31404421141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293499370.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 31404421141 its reverse (14112440413), we get a palindrome (45516861554).

The spelling of 31404421141 in words is "thirty-one billion, four hundred four million, four hundred twenty-one thousand, one hundred forty-one".