116551281 has 32 divisors (see below), whose sum is σ = 202180608. Its totient is φ = 57911040.

The previous prime is 116551271. The next prime is 116551291. The reversal of 116551281 is 182155611.

It is an interprime number because it is at equal distance from previous prime (116551271) and next prime (116551291).

It is not a de Polignac number, because 116551281 - 2⁵ = 116551249 is a prime.

It is a super-2 number, since 2×116551281² = 27168402205481922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (116551231) 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, 5656 + ... + 16281.

It is an arithmetic number, because the mean of its divisors is an integer number (6318144).

Almost surely, 2^116551281 is an apocalyptic number.

116551281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

116551281 is a deficient number, since it is larger than the sum of its proper divisors (85629327).

116551281 is a wasteful number, since it uses less digits than its factorization.

116551281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21981.

The product of its digits is 2400, while the sum is 30.

The square root of 116551281 is about 10795.8918575540. The cubic root of 116551281 is about 488.4712607504.

The spelling of 116551281 in words is "one hundred sixteen million, five hundred fifty-one thousand, two hundred eighty-one".