27731060431 has 4 divisors (see below), whose sum is σ = 27891355752. Its totient is φ = 27570765112.

The previous prime is 27731060429. The next prime is 27731060449. The reversal of 27731060431 is 13406013772.

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 27731060431 - 2¹ = 27731060429 is a prime.

It is a super-2 number, since 2×27731060431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27731060411) 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, 80147401 + ... + 80147746.

It is an arithmetic number, because the mean of its divisors is an integer number (6972838938).

Almost surely, 2^27731060431 is an apocalyptic number.

27731060431 is a deficient number, since it is larger than the sum of its proper divisors (160295321).

27731060431 is a wasteful number, since it uses less digits than its factorization.

27731060431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160295320.

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 27731060431 in words is "twenty-seven billion, seven hundred thirty-one million, sixty thousand, four hundred thirty-one".