2117500213481 has 8 divisors (see below), whose sum is σ = 2118183730344. Its totient is φ = 2116816814080.

The previous prime is 2117500213427. The next prime is 2117500213487. The reversal of 2117500213481 is 1843120057112.

It can be written as a sum of positive squares in 4 ways, for example, as 370302675625 + 1747197537856 = 608525^2 + 1321816^2 .

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 2117500213481 - 2⁶ = 2117500213417 is a prime.

It is a super-2 number, since 2×2117500213481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2117500213487) 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, 47650985 + ... + 47695401.

It is an arithmetic number, because the mean of its divisors is an integer number (264772966293).

Almost surely, 2^{2117500213481} is an apocalyptic number.

It is an amenable number.

2117500213481 is a deficient number, since it is larger than the sum of its proper divisors (683516863).

2117500213481 is an equidigital number, since it uses as much as digits as its factorization.

2117500213481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58731.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 2117500213481 in words is "two trillion, one hundred seventeen billion, five hundred million, two hundred thirteen thousand, four hundred eighty-one".