2117692307731 has 32 divisors (see below), whose sum is σ = 2966958425088. Its totient is φ = 1456988480640.

The previous prime is 2117692307729. The next prime is 2117692307741. The reversal of 2117692307731 is 1377032967112.

It is a happy number.

It is not a de Polignac number, because 2117692307731 - 2¹ = 2117692307729 is a prime.

It is a super-2 number, since 2×2117692307731² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2117692307741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45967776 + ... + 46013821.

It is an arithmetic number, because the mean of its divisors is an integer number (92717450784).

Almost surely, 2^{2117692307731} is an apocalyptic number.

2117692307731 is a deficient number, since it is larger than the sum of its proper divisors (849266117357).

2117692307731 is a wasteful number, since it uses less digits than its factorization.

2117692307731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91981651.

The product of its (nonzero) digits is 666792, while the sum is 49.

The spelling of 2117692307731 in words is "two trillion, one hundred seventeen billion, six hundred ninety-two million, three hundred seven thousand, seven hundred thirty-one".