21219160 has 32 divisors (see below), whose sum is σ = 48130560. Its totient is φ = 8418816.

The previous prime is 21219127. The next prime is 21219161. The reversal of 21219160 is 6191212.

It is a super-2 number, since 2×21219160² = 900505502211200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21219161) 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, 2992 + ... + 7168.

It is an arithmetic number, because the mean of its divisors is an integer number (1504080).

Almost surely, 2^21219160 is an apocalyptic number.

21219160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21219160 is an abundant number, since it is smaller than the sum of its proper divisors (26911400).

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

21219160 is a wasteful number, since it uses less digits than its factorization.

21219160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315 (or 4311 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 21219160 is about 4606.4259464361. The cubic root of 21219160 is about 276.8488534062.

The spelling of 21219160 in words is "twenty-one million, two hundred nineteen thousand, one hundred sixty".