215052454 has 8 divisors (see below), whose sum is σ = 322731720. Its totient is φ = 107475216.

The previous prime is 215052451. The next prime is 215052493. The reversal of 215052454 is 454250512.

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

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19999 + ... + 28810.

It is an arithmetic number, because the mean of its divisors is an integer number (40341465).

Almost surely, 2^215052454 is an apocalyptic number.

215052454 is a deficient number, since it is larger than the sum of its proper divisors (107679266).

215052454 is a wasteful number, since it uses less digits than its factorization.

215052454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51014.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 215052454 is about 14664.6668560864. Note that the first 3 decimals coincide. The cubic root of 215052454 is about 599.1213565301.

The spelling of 215052454 in words is "two hundred fifteen million, fifty-two thousand, four hundred fifty-four".