90110281 has 8 divisors (see below), whose sum is σ = 93465864. Its totient is φ = 86803200.

The previous prime is 90110269. The next prime is 90110291. The reversal of 90110281 is 18201109.

It can be written as a sum of positive squares in 4 ways, for example, as 63680400 + 26429881 = 7980^2 + 5141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90110281 - 2⁵ = 90110249 is a prime.

It is a super-2 number, since 2×90110281² = 16239725483797922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90110231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8320 + ... + 15793.

It is an arithmetic number, because the mean of its divisors is an integer number (11683233).

Almost surely, 2^90110281 is an apocalyptic number.

It is an amenable number.

90110281 is a deficient number, since it is larger than the sum of its proper divisors (3355583).

90110281 is a wasteful number, since it uses less digits than its factorization.

90110281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24251.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 90110281 is about 9492.6435201160. The cubic root of 90110281 is about 448.3234420903.

The spelling of 90110281 in words is "ninety million, one hundred ten thousand, two hundred eighty-one".