21055262 has 8 divisors (see below), whose sum is σ = 32601792. Its totient is φ = 10188000.

The previous prime is 21055261. The next prime is 21055277. The reversal of 21055262 is 26255012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21055261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169739 + ... + 169862.

It is an arithmetic number, because the mean of its divisors is an integer number (4075224).

Almost surely, 2^21055262 is an apocalyptic number.

21055262 is a deficient number, since it is larger than the sum of its proper divisors (11546530).

21055262 is a wasteful number, since it uses less digits than its factorization.

21055262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339634.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 21055262 is about 4588.6013119468. The cubic root of 21055262 is about 276.1342114885.

The spelling of 21055262 in words is "twenty-one million, fifty-five thousand, two hundred sixty-two".