47102185621 has 4 divisors (see below), whose sum is σ = 47180559244. Its totient is φ = 47023812000.

The previous prime is 47102185609. The next prime is 47102185667. The reversal of 47102185621 is 12658120174.

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 33103983025 + 13998202596 = 181945^2 + 118314^2 .

It is a cyclic number.

It is not a de Polignac number, because 47102185621 - 2¹³ = 47102177429 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 (47102185421) 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 3 ways as a sum of consecutive naturals, for example, 39185910 + ... + 39187111.

It is an arithmetic number, because the mean of its divisors is an integer number (11795139811).

Almost surely, 2^47102185621 is an apocalyptic number.

It is an amenable number.

47102185621 is a deficient number, since it is larger than the sum of its proper divisors (78373623).

47102185621 is an equidigital number, since it uses as much as digits as its factorization.

47102185621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78373622.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 47102185621 in words is "forty-seven billion, one hundred two million, one hundred eighty-five thousand, six hundred twenty-one".