169228281 has 8 divisors (see below), whose sum is σ = 226989504. Its totient is φ = 112142960.

The previous prime is 169228223. The next prime is 169228321. The reversal of 169228281 is 182822961.

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 169228281 - 2¹⁸ = 168966137 is a prime.

It is a super-2 number, since 2×169228281² = 57276422180429922, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (169228781) 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, 168390 + ... + 169391.

It is an arithmetic number, because the mean of its divisors is an integer number (28373688).

Almost surely, 2^169228281 is an apocalyptic number.

It is an amenable number.

169228281 is a deficient number, since it is larger than the sum of its proper divisors (57761223).

169228281 is a wasteful number, since it uses less digits than its factorization.

169228281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337951.

The product of its digits is 27648, while the sum is 39.

The square root of 169228281 is about 13008.7770754979. Note that the first 3 decimals coincide. The cubic root of 169228281 is about 553.1263070862.

The spelling of 169228281 in words is "one hundred sixty-nine million, two hundred twenty-eight thousand, two hundred eighty-one".