21232248 has 32 divisors (see below), whose sum is σ = 53557200. Its totient is φ = 7013888.

The previous prime is 21232247. The next prime is 21232249. The reversal of 21232248 is 84223212.

It is an interprime number because it is at equal distance from previous prime (21232247) and next prime (21232249).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232247) 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, 1203 + ... + 6626.

Almost surely, 2^21232248 is an apocalyptic number.

It is an amenable number.

21232248 is an abundant number, since it is smaller than the sum of its proper divisors (32324952).

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

21232248 is a wasteful number, since it uses less digits than its factorization.

21232248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951 (or 7947 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 21232248 is about 4607.8463516051. The cubic root of 21232248 is about 276.9057619278.

It can be divided in two parts, 2123 and 2248, that added together give a triangular number (4371 = T₉₃).

The spelling of 21232248 in words is "twenty-one million, two hundred thirty-two thousand, two hundred forty-eight".