63213455 has 4 divisors (see below), whose sum is σ = 75856152. Its totient is φ = 50570760.

The previous prime is 63213439. The next prime is 63213457. The reversal of 63213455 is 55431236.

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

It is not a de Polignac number, because 63213455 - 2⁴ = 63213439 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 (63213457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6321341 + ... + 6321350.

It is an arithmetic number, because the mean of its divisors is an integer number (18964038).

Almost surely, 2^63213455 is an apocalyptic number.

63213455 is a deficient number, since it is larger than the sum of its proper divisors (12642697).

63213455 is a wasteful number, since it uses less digits than its factorization.

63213455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642696.

The product of its digits is 10800, while the sum is 29.

The square root of 63213455 is about 7950.6889638572. The cubic root of 63213455 is about 398.3546055566.

The spelling of 63213455 in words is "sixty-three million, two hundred thirteen thousand, four hundred fifty-five".