63213215 has 16 divisors (see below), whose sum is σ = 82682208. Its totient is φ = 46114176.

The previous prime is 63213211. The next prime is 63213233. The reversal of 63213215 is 51231236.

It is a cyclic number.

It is not a de Polignac number, because 63213215 - 2² = 63213211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63213211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464 + ... + 11253.

It is an arithmetic number, because the mean of its divisors is an integer number (5167638).

Almost surely, 2^63213215 is an apocalyptic number.

63213215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63213215 is a deficient number, since it is larger than the sum of its proper divisors (19468993).

63213215 is a wasteful number, since it uses less digits than its factorization.

63213215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11818.

The product of its digits is 1080, while the sum is 23.

The square root of 63213215 is about 7950.6738708112. The cubic root of 63213215 is about 398.3541014169.

The spelling of 63213215 in words is "sixty-three million, two hundred thirteen thousand, two hundred fifteen".