163215641 has 4 divisors (see below), whose sum is σ = 163322292. Its totient is φ = 163108992.

The previous prime is 163215593. The next prime is 163215677. The reversal of 163215641 is 146512361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102313225 + 60902416 = 10115^2 + 7804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163215641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163215841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50996 + ... + 54101.

It is an arithmetic number, because the mean of its divisors is an integer number (40830573).

Almost surely, 2^163215641 is an apocalyptic number.

It is an amenable number.

163215641 is a deficient number, since it is larger than the sum of its proper divisors (106651).

163215641 is a wasteful number, since it uses less digits than its factorization.

163215641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106650.

The product of its digits is 4320, while the sum is 29.

The square root of 163215641 is about 12775.5876968537. The cubic root of 163215641 is about 546.4963407417.

The spelling of 163215641 in words is "one hundred sixty-three million, two hundred fifteen thousand, six hundred forty-one".