63215969 has 8 divisors (see below), whose sum is σ = 65520360. Its totient is φ = 60919936.

The previous prime is 63215959. The next prime is 63215989. The reversal of 63215969 is 96951236.

It can be written as a sum of positive squares in 4 ways, for example, as 4494400 + 58721569 = 2120^2 + 7663^2 .

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 63215969 - 2⁴ = 63215953 is a prime.

It is a super-2 number, since 2×63215969² = 7992517473217922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63215939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16127 + ... + 19659.

It is an arithmetic number, because the mean of its divisors is an integer number (8190045).

Almost surely, 2^63215969 is an apocalyptic number.

It is an amenable number.

63215969 is a deficient number, since it is larger than the sum of its proper divisors (2304391).

63215969 is a wasteful number, since it uses less digits than its factorization.

63215969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179.

The product of its digits is 87480, while the sum is 41.

The square root of 63215969 is about 7950.8470617916. The cubic root of 63215969 is about 398.3598863427.

The spelling of 63215969 in words is "sixty-three million, two hundred fifteen thousand, nine hundred sixty-nine".