21415053 has 32 divisors (see below), whose sum is σ = 33592320. Its totient is φ = 11989760.

The previous prime is 21415027. The next prime is 21415067. The reversal of 21415053 is 35051412.

It is a de Polignac number, because none of the positive numbers 2^k-21415053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415153) 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 31 ways as a sum of consecutive naturals, for example, 32776 + ... + 33422.

It is an arithmetic number, because the mean of its divisors is an integer number (1049760).

Almost surely, 2^21415053 is an apocalyptic number.

It is an amenable number.

21415053 is a deficient number, since it is larger than the sum of its proper divisors (12177267).

21415053 is a wasteful number, since it uses less digits than its factorization.

21415053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 21415053 is about 4627.6401113310. The cubic root of 21415053 is about 277.6981913450.

Adding to 21415053 its reverse (35051412), we get a palindrome (56466465).

The spelling of 21415053 in words is "twenty-one million, four hundred fifteen thousand, fifty-three".