215225463 has 4 divisors (see below), whose sum is σ = 286967288. Its totient is φ = 143483640.

The previous prime is 215225459. The next prime is 215225473. The reversal of 215225463 is 364522512.

215225463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 215225463 - 2² = 215225459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215225463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215225473) 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, 35870908 + ... + 35870913.

It is an arithmetic number, because the mean of its divisors is an integer number (71741822).

Almost surely, 2^215225463 is an apocalyptic number.

215225463 is a deficient number, since it is larger than the sum of its proper divisors (71741825).

215225463 is an equidigital number, since it uses as much as digits as its factorization.

215225463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71741824.

The product of its digits is 14400, while the sum is 30.

The square root of 215225463 is about 14670.5645085661. The cubic root of 215225463 is about 599.2819771926.

Adding to 215225463 its reverse (364522512), we get a palindrome (579747975).

The spelling of 215225463 in words is "two hundred fifteen million, two hundred twenty-five thousand, four hundred sixty-three".