21161150 has 24 divisors (see below), whose sum is σ = 41073264. Its totient is φ = 8096000.

The previous prime is 21161137. The next prime is 21161191. The reversal of 21161150 is 5116112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8051 + ... + 10350.

It is an arithmetic number, because the mean of its divisors is an integer number (1711386).

Almost surely, 2^21161150 is an apocalyptic number.

21161150 is a deficient number, since it is larger than the sum of its proper divisors (19912114).

21161150 is a wasteful number, since it uses less digits than its factorization.

21161150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18436 (or 18431 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 21161150 is about 4600.1249983017. The cubic root of 21161150 is about 276.5963354073.

Adding to 21161150 its reverse (5116112), we get a palindrome (26277262).

The spelling of 21161150 in words is "twenty-one million, one hundred sixty-one thousand, one hundred fifty".