21652055 has 8 divisors (see below), whose sum is σ = 26370672. Its totient is φ = 17062848.

The previous prime is 21652003. The next prime is 21652061. The reversal of 21652055 is 55025612.

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

It is a cyclic number.

It is not a de Polignac number, because 21652055 - 2¹⁴ = 21635671 is a prime.

It is a super-2 number, since 2×21652055² = 937622971446050, which contains 22 as substring.

It is a Duffinian number.

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, 31982 + ... + 32651.

It is an arithmetic number, because the mean of its divisors is an integer number (3296334).

Almost surely, 2^21652055 is an apocalyptic number.

21652055 is a deficient number, since it is larger than the sum of its proper divisors (4718617).

21652055 is an equidigital number, since it uses as much as digits as its factorization.

21652055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64705.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 21652055 is about 4653.1768717727. The cubic root of 21652055 is about 278.7188708225.

Adding to 21652055 its reverse (55025612), we get a palindrome (76677667).

The spelling of 21652055 in words is "twenty-one million, six hundred fifty-two thousand, fifty-five".