21575054 has 8 divisors (see below), whose sum is σ = 32818608. Its totient is φ = 10635520.

The previous prime is 21575053. The next prime is 21575069. The reversal of 21575054 is 45057512.

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 (21575053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75827 + ... + 76110.

It is an arithmetic number, because the mean of its divisors is an integer number (4102326).

Almost surely, 2^21575054 is an apocalyptic number.

21575054 is a deficient number, since it is larger than the sum of its proper divisors (11243554).

21575054 is a wasteful number, since it uses less digits than its factorization.

21575054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152010.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 21575054 is about 4644.8954778337. The cubic root of 21575054 is about 278.3880766104.

The spelling of 21575054 in words is "twenty-one million, five hundred seventy-five thousand, fifty-four".