21160371 has 8 divisors (see below), whose sum is σ = 28250320. Its totient is φ = 14088672.

The previous prime is 21160339. The next prime is 21160379. The reversal of 21160371 is 17306112.

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

It is not a de Polignac number, because 21160371 - 2⁵ = 21160339 is a prime.

It is a super-2 number, since 2×21160371² = 895522601715282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21160379) 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, 1576 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (3531290).

Almost surely, 2^21160371 is an apocalyptic number.

21160371 is a deficient number, since it is larger than the sum of its proper divisors (7089949).

21160371 is an equidigital number, since it uses as much as digits as its factorization.

21160371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125.

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

The square root of 21160371 is about 4600.0403259102. The cubic root of 21160371 is about 276.5929412756.

Adding to 21160371 its reverse (17306112), we get a palindrome (38466483).

The spelling of 21160371 in words is "twenty-one million, one hundred sixty thousand, three hundred seventy-one".