110051981 has 4 divisors (see below), whose sum is σ = 118517532. Its totient is φ = 101586432.

The previous prime is 110051969. The next prime is 110051993. The reversal of 110051981 is 189150011.

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

It is an interprime number because it is at equal distance from previous prime (110051969) and next prime (110051993).

It can be written as a sum of positive squares in 2 ways, for example, as 15476356 + 94575625 = 3934^2 + 9725^2 .

It is a cyclic number.

It is not a de Polignac number, because 110051981 - 2¹⁸ = 109789837 is a prime.

It is a super-2 number, since 2×110051981² = 24222877044048722, 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 110051981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110051951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4232756 + ... + 4232781.

It is an arithmetic number, because the mean of its divisors is an integer number (29629383).

Almost surely, 2^110051981 is an apocalyptic number.

It is an amenable number.

110051981 is a deficient number, since it is larger than the sum of its proper divisors (8465551).

110051981 is an equidigital number, since it uses as much as digits as its factorization.

110051981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465550.

The product of its (nonzero) digits is 360, while the sum is 26.

The square root of 110051981 is about 10490.5662859543. The cubic root of 110051981 is about 479.2174473954.

The spelling of 110051981 in words is "one hundred ten million, fifty-one thousand, nine hundred eighty-one".