169151481 has 12 divisors (see below), whose sum is σ = 244498020. Its totient is φ = 112690080.

The previous prime is 169151473. The next prime is 169151491. The reversal of 169151481 is 184151961.

It is a happy number.

169151481 is a `hidden beast` number, since 1 + 69 + 1 + 514 + 81 = 666.

169151481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 140635881 + 28515600 = 11859^2 + 5340^2 .

It is not a de Polignac number, because 169151481 - 2³ = 169151473 is a prime.

It is a super-2 number, since 2×169151481² = 57224447048986722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169151491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9391 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (20374835).

Almost surely, 2^169151481 is an apocalyptic number.

It is an amenable number.

169151481 is a deficient number, since it is larger than the sum of its proper divisors (75346539).

169151481 is a wasteful number, since it uses less digits than its factorization.

169151481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936 (or 12933 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 169151481 is about 13005.8248873341. The cubic root of 169151481 is about 553.0426202699.

The spelling of 169151481 in words is "one hundred sixty-nine million, one hundred fifty-one thousand, four hundred eighty-one".