31356064543321 has 4 divisors (see below), whose sum is σ = 35835502335232. Its totient is φ = 26876626751412.

The previous prime is 31356064543273. The next prime is 31356064543361. The reversal of 31356064543321 is 12334546065313.

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 31356064543321 - 2¹¹ = 31356064541273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31356064543361) 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, 2239718895945 + ... + 2239718895958.

It is an arithmetic number, because the mean of its divisors is an integer number (8958875583808).

Almost surely, 2^{31356064543321} is an apocalyptic number.

It is an amenable number.

31356064543321 is a deficient number, since it is larger than the sum of its proper divisors (4479437791911).

31356064543321 is an equidigital number, since it uses as much as digits as its factorization.

31356064543321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479437791910.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 31356064543321 in words is "thirty-one trillion, three hundred fifty-six billion, sixty-four million, five hundred forty-three thousand, three hundred twenty-one".