63861215 has 8 divisors (see below), whose sum is σ = 83600208. Its totient is φ = 46444480.

The previous prime is 63861173. The next prime is 63861221. The reversal of 63861215 is 51216836.

It is a happy number.

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

It is not a de Polignac number, because 63861215 - 2¹⁰ = 63860191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580502 + ... + 580611.

It is an arithmetic number, because the mean of its divisors is an integer number (10450026).

Almost surely, 2^63861215 is an apocalyptic number.

63861215 is a deficient number, since it is larger than the sum of its proper divisors (19738993).

63861215 is a wasteful number, since it uses less digits than its factorization.

63861215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161129.

The product of its digits is 8640, while the sum is 32.

The square root of 63861215 is about 7991.3212299344. The cubic root of 63861215 is about 399.7106553330.

The spelling of 63861215 in words is "sixty-three million, eight hundred sixty-one thousand, two hundred fifteen".