63215105 has 4 divisors (see below), whose sum is σ = 75858132. Its totient is φ = 50572080.

The previous prime is 63215081. The next prime is 63215111. The reversal of 63215105 is 50151236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28558336 + 34656769 = 5344^2 + 5887^2 .

It is not a de Polignac number, because 63215105 - 2¹² = 63211009 is a prime.

It is a super-2 number, since 2×63215105² = 7992299000322050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6321506 + ... + 6321515.

It is an arithmetic number, because the mean of its divisors is an integer number (18964533).

Almost surely, 2^63215105 is an apocalyptic number.

It is an amenable number.

63215105 is a deficient number, since it is larger than the sum of its proper divisors (12643027).

63215105 is a wasteful number, since it uses less digits than its factorization.

63215105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12643026.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 63215105 is about 7950.7927277725. The cubic root of 63215105 is about 398.3580714821.

The spelling of 63215105 in words is "sixty-three million, two hundred fifteen thousand, one hundred five".