31330104431 has 4 divisors (see below), whose sum is σ = 31331323632. Its totient is φ = 31328885232.

The previous prime is 31330104427. The next prime is 31330104439. The reversal of 31330104431 is 13440103313.

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 31330104431 - 2² = 31330104427 is a prime.

It is a super-2 number, since 2×31330104431² (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 = 31330104397 and 31330104406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330104439) 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, 570206 + ... + 622731.

It is an arithmetic number, because the mean of its divisors is an integer number (7832830908).

Almost surely, 2^31330104431 is an apocalyptic number.

31330104431 is a deficient number, since it is larger than the sum of its proper divisors (1219201).

31330104431 is a wasteful number, since it uses less digits than its factorization.

31330104431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219200.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31330104431 its reverse (13440103313), we get a palindrome (44770207744).

The spelling of 31330104431 in words is "thirty-one billion, three hundred thirty million, one hundred four thousand, four hundred thirty-one".