63215287 has 2 divisors, whose sum is σ = 63215288. Its totient is φ = 63215286.

The previous prime is 63215281. The next prime is 63215303. The reversal of 63215287 is 78251236.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63215287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63215281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31607643 + 31607644.

It is an arithmetic number, because the mean of its divisors is an integer number (31607644).

Almost surely, 2^63215287 is an apocalyptic number.

63215287 is a deficient number, since it is larger than the sum of its proper divisors (1).

63215287 is an equidigital number, since it uses as much as digits as its factorization.

63215287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 63215287 is about 7950.8041731639. The cubic root of 63215287 is about 398.3584537805.

The spelling of 63215287 in words is "sixty-three million, two hundred fifteen thousand, two hundred eighty-seven".