105521675281 has 9 divisors (see below), whose sum is σ = 115990562569. Its totient is φ = 95925547300.

The previous prime is 105521675251. The next prime is 105521675293. The reversal of 105521675281 is 182576125501.

The square root of 105521675281 is 324841.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 105521675281 - 2⁵ = 105521675249 is a prime.

It is a super-2 number, since 2×105521675281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105521675251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3558486 + ... + 3588016.

Almost surely, 2^105521675281 is an apocalyptic number.

105521675281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

105521675281 is the 324841-st square number.

105521675281 is the 162421-st centered octagonal number.

It is an amenable number.

105521675281 is a deficient number, since it is larger than the sum of its proper divisors (10468887288).

105521675281 is an frugal number, since it uses more digits than its factorization.

105521675281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59084 (or 29542 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 43.

The spelling of 105521675281 in words is "one hundred five billion, five hundred twenty-one million, six hundred seventy-five thousand, two hundred eighty-one".