47811572021 has 16 divisors (see below), whose sum is σ = 50851494144. Its totient is φ = 44797369344.

The previous prime is 47811571961. The next prime is 47811572059. The reversal of 47811572021 is 12027511874.

It is a cyclic number.

It is not a de Polignac number, because 47811572021 - 2¹⁰ = 47811570997 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 (47811502021) 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 15 ways as a sum of consecutive naturals, for example, 3693266 + ... + 3706188.

It is an arithmetic number, because the mean of its divisors is an integer number (3178218384).

Almost surely, 2^47811572021 is an apocalyptic number.

It is an amenable number.

47811572021 is a deficient number, since it is larger than the sum of its proper divisors (3039922123).

47811572021 is a wasteful number, since it uses less digits than its factorization.

47811572021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13900.

The product of its (nonzero) digits is 31360, while the sum is 38.

The spelling of 47811572021 in words is "forty-seven billion, eight hundred eleven million, five hundred seventy-two thousand, twenty-one".