4215205561 has 8 divisors (see below), whose sum is σ = 5026829184. Its totient is φ = 3455944800.

The previous prime is 4215205559. The next prime is 4215205567. The reversal of 4215205561 is 1655025124.

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

It is not a de Polignac number, because 4215205561 - 2¹ = 4215205559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4215205567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13090540 + ... + 13090861.

It is an arithmetic number, because the mean of its divisors is an integer number (628353648).

Almost surely, 2^4215205561 is an apocalyptic number.

It is an amenable number.

4215205561 is a deficient number, since it is larger than the sum of its proper divisors (811623623).

4215205561 is a wasteful number, since it uses less digits than its factorization.

4215205561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181431.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 4215205561 is about 64924.6144462946. The cubic root of 4215205561 is about 1615.3733714850.

The spelling of 4215205561 in words is "four billion, two hundred fifteen million, two hundred five thousand, five hundred sixty-one".