21231462 has 16 divisors (see below), whose sum is σ = 48529152. Its totient is φ = 6066120.

The previous prime is 21231449. The next prime is 21231473. The reversal of 21231462 is 26413212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 252714 + ... + 252797.

It is an arithmetic number, because the mean of its divisors is an integer number (3033072).

Almost surely, 2^21231462 is an apocalyptic number.

21231462 is an abundant number, since it is smaller than the sum of its proper divisors (27297690).

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

21231462 is a wasteful number, since it uses less digits than its factorization.

21231462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505523.

The product of its digits is 576, while the sum is 21.

The square root of 21231462 is about 4607.7610615135. The cubic root of 21231462 is about 276.9023449460.

Adding to 21231462 its reverse (26413212), we get a palindrome (47644674).

The spelling of 21231462 in words is "twenty-one million, two hundred thirty-one thousand, four hundred sixty-two".