21161352 has 32 divisors (see below), whose sum is σ = 53503200. Its totient is φ = 6973824.

The previous prime is 21161323. The next prime is 21161377. The reversal of 21161352 is 25316112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818 + ... + 7089.

It is an arithmetic number, because the mean of its divisors is an integer number (1671975).

Almost surely, 2^21161352 is an apocalyptic number.

It is an amenable number.

21161352 is an abundant number, since it is smaller than the sum of its proper divisors (32341848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21161352 is a wasteful number, since it uses less digits than its factorization.

21161352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005 (or 10001 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 21161352 is about 4600.1469541744. The cubic root of 21161352 is about 276.5972155151.

Adding to 21161352 its reverse (25316112), we get a palindrome (46477464).

The spelling of 21161352 in words is "twenty-one million, one hundred sixty-one thousand, three hundred fifty-two".