31141443621 has 4 divisors (see below), whose sum is σ = 41521924832. Its totient is φ = 20760962412.

The previous prime is 31141443577. The next prime is 31141443623. The reversal of 31141443621 is 12634414113.

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.

It is not a de Polignac number, because 31141443621 - 2⁷ = 31141443493 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 (31141443623) 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, 5190240601 + ... + 5190240606.

It is an arithmetic number, because the mean of its divisors is an integer number (10380481208).

Almost surely, 2^31141443621 is an apocalyptic number.

It is an amenable number.

31141443621 is a deficient number, since it is larger than the sum of its proper divisors (10380481211).

31141443621 is a wasteful number, since it uses less digits than its factorization.

31141443621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380481210.

The product of its digits is 6912, while the sum is 30.

Adding to 31141443621 its reverse (12634414113), we get a palindrome (43775857734).

The spelling of 31141443621 in words is "thirty-one billion, one hundred forty-one million, four hundred forty-three thousand, six hundred twenty-one".