47221724561 has 4 divisors (see below), whose sum is σ = 51514608624. Its totient is φ = 42928840500.

The previous prime is 47221724519. The next prime is 47221724569. The reversal of 47221724561 is 16542712274.

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 a de Polignac number, because none of the positive numbers 2^k-47221724561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47221724569) 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 3 ways as a sum of consecutive naturals, for example, 2146442015 + ... + 2146442036.

It is an arithmetic number, because the mean of its divisors is an integer number (12878652156).

Almost surely, 2^47221724561 is an apocalyptic number.

It is an amenable number.

47221724561 is a deficient number, since it is larger than the sum of its proper divisors (4292884063).

47221724561 is a wasteful number, since it uses less digits than its factorization.

47221724561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292884062.

The product of its digits is 188160, while the sum is 41.

The spelling of 47221724561 in words is "forty-seven billion, two hundred twenty-one million, seven hundred twenty-four thousand, five hundred sixty-one".