47031551821 has 16 divisors (see below), whose sum is σ = 49524940800. Its totient is φ = 44602242048.

The previous prime is 47031551803. The next prime is 47031551933. The reversal of 47031551821 is 12815513074.

It is a cyclic number.

It is not a de Polignac number, because 47031551821 - 2¹⁵ = 47031519053 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 (47031551221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388980 + ... + 495346.

It is an arithmetic number, because the mean of its divisors is an integer number (3095308800).

Almost surely, 2^47031551821 is an apocalyptic number.

It is an amenable number.

47031551821 is a deficient number, since it is larger than the sum of its proper divisors (2493388979).

47031551821 is a wasteful number, since it uses less digits than its factorization.

47031551821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106668.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 47031551821 in words is "forty-seven billion, thirty-one million, five hundred fifty-one thousand, eight hundred twenty-one".