215052455 has 4 divisors (see below), whose sum is σ = 258062952. Its totient is φ = 172041960.

The previous prime is 215052451. The next prime is 215052493. The reversal of 215052455 is 554250512.

215052455 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 215052455 - 2² = 215052451 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 (215052451) 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, 21505241 + ... + 21505250.

It is an arithmetic number, because the mean of its divisors is an integer number (64515738).

Almost surely, 2^215052455 is an apocalyptic number.

215052455 is a deficient number, since it is larger than the sum of its proper divisors (43010497).

215052455 is an equidigital number, since it uses as much as digits as its factorization.

215052455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010496.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 215052455 is about 14664.6668901820. Note that the first 3 decimals coincide. The cubic root of 215052455 is about 599.1213574587.

The spelling of 215052455 in words is "two hundred fifteen million, fifty-two thousand, four hundred fifty-five".