47991222001 has 4 divisors (see below), whose sum is σ = 48007677172. Its totient is φ = 47974766832.

The previous prime is 47991221981. The next prime is 47991222007. The reversal of 47991222001 is 10022219974.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26109712225 + 21881509776 = 161585^2 + 147924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47991222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47991222007) 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, 8223210 + ... + 8229043.

It is an arithmetic number, because the mean of its divisors is an integer number (12001919293).

Almost surely, 2^47991222001 is an apocalyptic number.

It is an amenable number.

47991222001 is a deficient number, since it is larger than the sum of its proper divisors (16455171).

47991222001 is a wasteful number, since it uses less digits than its factorization.

47991222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16455170.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 47991222001 in words is "forty-seven billion, nine hundred ninety-one million, two hundred twenty-two thousand, one".