31577343853 has 4 divisors (see below), whose sum is σ = 34448011488. Its totient is φ = 28706676220.

The previous prime is 31577343851. The next prime is 31577343983. The reversal of 31577343853 is 35834377513.

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 a cyclic number.

It is not a de Polignac number, because 31577343853 - 2¹ = 31577343851 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 31577343797 and 31577343806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31577343851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435333801 + ... + 1435333822.

It is an arithmetic number, because the mean of its divisors is an integer number (8612002872).

Almost surely, 2^31577343853 is an apocalyptic number.

It is an amenable number.

31577343853 is a deficient number, since it is larger than the sum of its proper divisors (2870667635).

31577343853 is a wasteful number, since it uses less digits than its factorization.

31577343853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870667634.

The product of its digits is 3175200, while the sum is 49.

The spelling of 31577343853 in words is "thirty-one billion, five hundred seventy-seven million, three hundred forty-three thousand, eight hundred fifty-three".