163144725 has 12 divisors (see below), whose sum is σ = 269732736. Its totient is φ = 87010480.

The previous prime is 163144711. The next prime is 163144741. The reversal of 163144725 is 527441361.

It is not a de Polignac number, because 163144725 - 2¹² = 163140629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087557 + ... + 1087706.

It is an arithmetic number, because the mean of its divisors is an integer number (22477728).

Almost surely, 2^163144725 is an apocalyptic number.

163144725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163144725 is a deficient number, since it is larger than the sum of its proper divisors (106588011).

163144725 is a wasteful number, since it uses less digits than its factorization.

163144725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175276 (or 2175271 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 163144725 is about 12772.8119456915. The cubic root of 163144725 is about 546.4171797238.

The spelling of 163144725 in words is "one hundred sixty-three million, one hundred forty-four thousand, seven hundred twenty-five".