117051811 has 4 divisors (see below), whose sum is σ = 119035800. Its totient is φ = 115067824.

The previous prime is 117051787. The next prime is 117051827. The reversal of 117051811 is 118150711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117051811 - 2¹¹ = 117049763 is a prime.

It is a super-2 number, since 2×117051811² = 27402252916759442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117051871) 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, 991906 + ... + 992023.

It is an arithmetic number, because the mean of its divisors is an integer number (29758950).

Almost surely, 2^117051811 is an apocalyptic number.

117051811 is a deficient number, since it is larger than the sum of its proper divisors (1983989).

117051811 is an equidigital number, since it uses as much as digits as its factorization.

117051811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983988.

The product of its (nonzero) digits is 280, while the sum is 25.

The square root of 117051811 is about 10819.0485256329. The cubic root of 117051811 is about 489.1695094996.

The spelling of 117051811 in words is "one hundred seventeen million, fifty-one thousand, eight hundred eleven".