21175053 has 8 divisors (see below), whose sum is σ = 28260288. Its totient is φ = 14103264.

The previous prime is 21175039. The next prime is 21175067. The reversal of 21175053 is 35057112.

It is an interprime number because it is at equal distance from previous prime (21175039) and next prime (21175067).

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

It is not a de Polignac number, because 21175053 - 2⁹ = 21174541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21175073) 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 7 ways as a sum of consecutive naturals, for example, 1201 + ... + 6617.

It is an arithmetic number, because the mean of its divisors is an integer number (3532536).

Almost surely, 2^21175053 is an apocalyptic number.

It is an amenable number.

21175053 is a deficient number, since it is larger than the sum of its proper divisors (7085235).

21175053 is a wasteful number, since it uses less digits than its factorization.

21175053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 21175053 is about 4601.6359047626. The cubic root of 21175053 is about 276.6568972857.

The spelling of 21175053 in words is "twenty-one million, one hundred seventy-five thousand, fifty-three".