21132319 has 8 divisors (see below), whose sum is σ = 23188032. Its totient is φ = 19138080.

The previous prime is 21132317. The next prime is 21132341. The reversal of 21132319 is 91323112.

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

It is not a de Polignac number, because 21132319 - 2¹ = 21132317 is a prime.

It is a super-2 number, since 2×21132319² = 893149812635522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21132319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132311) 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, 14647 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (2898504).

Almost surely, 2^21132319 is an apocalyptic number.

21132319 is a deficient number, since it is larger than the sum of its proper divisors (2055713).

21132319 is a wasteful number, since it uses less digits than its factorization.

21132319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30737.

The product of its digits is 324, while the sum is 22.

The square root of 21132319 is about 4596.9902109968. The cubic root of 21132319 is about 276.4706621282.

The spelling of 21132319 in words is "twenty-one million, one hundred thirty-two thousand, three hundred nineteen".