163145481 has 8 divisors (see below), whose sum is σ = 230323104. Its totient is φ = 102365760.

The previous prime is 163145461. The next prime is 163145531. The reversal of 163145481 is 184541361.

163145481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 163145481 - 2⁵ = 163145449 is a prime.

It is a super-2 number, since 2×163145481² = 53232895941442722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163145431) 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, 1599415 + ... + 1599516.

It is an arithmetic number, because the mean of its divisors is an integer number (28790388).

Almost surely, 2^163145481 is an apocalyptic number.

It is an amenable number.

163145481 is a deficient number, since it is larger than the sum of its proper divisors (67177623).

163145481 is a wasteful number, since it uses less digits than its factorization.

163145481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198951.

The product of its digits is 11520, while the sum is 33.

The square root of 163145481 is about 12772.8415397671. The cubic root of 163145481 is about 546.4180237408.

The spelling of 163145481 in words is "one hundred sixty-three million, one hundred forty-five thousand, four hundred eighty-one".