21182252 has 24 divisors (see below), whose sum is σ = 45624096. Its totient is φ = 8379648.

The previous prime is 21182243. The next prime is 21182261. The reversal of 21182252 is 25228112.

It is an interprime number because it is at equal distance from previous prime (21182243) and next prime (21182261).

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, 28733 + ... + 29460.

It is an arithmetic number, because the mean of its divisors is an integer number (1901004).

Almost surely, 2^21182252 is an apocalyptic number.

It is an amenable number.

21182252 is an abundant number, since it is smaller than the sum of its proper divisors (24441844).

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

21182252 is a wasteful number, since it uses less digits than its factorization.

21182252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58217 (or 58215 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 21182252 is about 4602.4180601071. The cubic root of 21182252 is about 276.6882459257.

The spelling of 21182252 in words is "twenty-one million, one hundred eighty-two thousand, two hundred fifty-two".