47205073921 has 8 divisors (see below), whose sum is σ = 48157916040. Its totient is φ = 46261619712.

The previous prime is 47205073913. The next prime is 47205073943. The reversal of 47205073921 is 12937050274.

It can be written as a sum of positive squares in 4 ways, for example, as 403809025 + 46801264896 = 20095^2 + 216336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47205073921 - 2³ = 47205073913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47205076921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336820 + ... + 2356933.

It is an arithmetic number, because the mean of its divisors is an integer number (6019739505).

Almost surely, 2^47205073921 is an apocalyptic number.

It is an amenable number.

47205073921 is a deficient number, since it is larger than the sum of its proper divisors (952842119).

47205073921 is a wasteful number, since it uses less digits than its factorization.

47205073921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693955.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 47205073921 in words is "forty-seven billion, two hundred five million, seventy-three thousand, nine hundred twenty-one".