47217181998309 has 16 divisors (see below), whose sum is σ = 63715044533952. Its totient is φ = 31098723884928.

The previous prime is 47217181998271. The next prime is 47217181998347. The reversal of 47217181998309 is 90389918171274.

It is an interprime number because it is at equal distance from previous prime (47217181998271) and next prime (47217181998347).

It is not a de Polignac number, because 47217181998309 - 2²⁰ = 47217180949733 is a prime.

It is a super-2 number, since 2×47217181998309² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47217181998509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103474119 + ... + 103929435.

It is an arithmetic number, because the mean of its divisors is an integer number (3982190283372).

Almost surely, 2^{47217181998309} is an apocalyptic number.

It is an amenable number.

47217181998309 is a deficient number, since it is larger than the sum of its proper divisors (16497862535643).

47217181998309 is a wasteful number, since it uses less digits than its factorization.

47217181998309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871876.

The product of its (nonzero) digits is 54867456, while the sum is 69.

The spelling of 47217181998309 in words is "forty-seven trillion, two hundred seventeen billion, one hundred eighty-one million, nine hundred ninety-eight thousand, three hundred nine".