117051731 has 4 divisors (see below), whose sum is σ = 117073392. Its totient is φ = 117030072.

The previous prime is 117051713. The next prime is 117051733. The reversal of 117051731 is 137150711.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 137150711 = 1181 ⋅116131.

It is a cyclic number.

It is not a de Polignac number, because 117051731 - 2¹⁰ = 117050707 is a prime.

It is a super-2 number, since 2×117051731² = 27402215460192722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117051731.

It is not an unprimeable number, because it can be changed into a prime (117051733) 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, 4685 + ... + 16001.

It is an arithmetic number, because the mean of its divisors is an integer number (29268348).

Almost surely, 2^117051731 is an apocalyptic number.

117051731 is a deficient number, since it is larger than the sum of its proper divisors (21661).

117051731 is a wasteful number, since it uses less digits than its factorization.

117051731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21660.

The product of its (nonzero) digits is 735, while the sum is 26.

The square root of 117051731 is about 10819.0448284495. The cubic root of 117051731 is about 489.1693980573.

The spelling of 117051731 in words is "one hundred seventeen million, fifty-one thousand, seven hundred thirty-one".