215734055 has 4 divisors (see below), whose sum is σ = 258880872. Its totient is φ = 172587240.

The previous prime is 215734039. The next prime is 215734073. The reversal of 215734055 is 550437512.

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

It is not a de Polignac number, because 215734055 - 2⁴ = 215734039 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 3 ways as a sum of consecutive naturals, for example, 21573401 + ... + 21573410.

It is an arithmetic number, because the mean of its divisors is an integer number (64720218).

Almost surely, 2^215734055 is an apocalyptic number.

215734055 is a deficient number, since it is larger than the sum of its proper divisors (43146817).

215734055 is an equidigital number, since it uses as much as digits as its factorization.

215734055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43146816.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 215734055 is about 14687.8880374273. Note that the first 3 decimals coincide. The cubic root of 215734055 is about 599.7536534991.

The spelling of 215734055 in words is "two hundred fifteen million, seven hundred thirty-four thousand, fifty-five".