21971162 has 8 divisors (see below), whose sum is σ = 33760692. Its totient is φ = 10717600.

The previous prime is 21971161. The next prime is 21971177. The reversal of 21971162 is 26117912.

It can be written as a sum of positive squares in 2 ways, for example, as 14523721 + 7447441 = 3811^2 + 2729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21971161) 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, 133889 + ... + 134052.

Almost surely, 2^21971162 is an apocalyptic number.

21971162 is a deficient number, since it is larger than the sum of its proper divisors (11789530).

21971162 is a wasteful number, since it uses less digits than its factorization.

21971162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267984.

The product of its digits is 1512, while the sum is 29.

The square root of 21971162 is about 4687.3406106235. The cubic root of 21971162 is about 280.0814473944.

The spelling of 21971162 in words is "twenty-one million, nine hundred seventy-one thousand, one hundred sixty-two".