10163721 has 8 divisors (see below), whose sum is σ = 13742784. Its totient is φ = 6680240.

The previous prime is 10163719. The next prime is 10163729. The reversal of 10163721 is 12736101.

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

It is a cyclic number.

It is not a de Polignac number, because 10163721 - 2¹ = 10163719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10163729) 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, 23646 + ... + 24071.

It is an arithmetic number, because the mean of its divisors is an integer number (1717848).

Almost surely, 2^10163721 is an apocalyptic number.

It is an amenable number.

10163721 is a deficient number, since it is larger than the sum of its proper divisors (3579063).

10163721 is an equidigital number, since it uses as much as digits as its factorization.

10163721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47791.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 10163721 is about 3188.0591274316. The cubic root of 10163721 is about 216.6128642215.

Adding to 10163721 its reverse (12736101), we get a palindrome (22899822).

The spelling of 10163721 in words is "ten million, one hundred sixty-three thousand, seven hundred twenty-one".