163321461 has 32 divisors (see below), whose sum is σ = 250698240. Its totient is φ = 105019200.

The previous prime is 163321453. The next prime is 163321463. The reversal of 163321461 is 164123361.

163321461 is a `hidden beast` number, since 1 + 633 + 21 + 4 + 6 + 1 = 666.

It is not a de Polignac number, because 163321461 - 2³ = 163321453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163321463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86356 + ... + 88226.

It is an arithmetic number, because the mean of its divisors is an integer number (7834320).

Almost surely, 2^163321461 is an apocalyptic number.

It is an amenable number.

163321461 is a deficient number, since it is larger than the sum of its proper divisors (87376779).

163321461 is a wasteful number, since it uses less digits than its factorization.

163321461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1988 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 163321461 is about 12779.7285182433. The cubic root of 163321461 is about 546.6144212331.

The spelling of 163321461 in words is "one hundred sixty-three million, three hundred twenty-one thousand, four hundred sixty-one".