215093 has 4 divisors (see below), whose sum is σ = 222540. Its totient is φ = 207648.

The previous prime is 215087. The next prime is 215123. The reversal of 215093 is 390512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 69169 = 382^2 + 263^2 .

It is a cyclic number.

It is not a de Polignac number, because 215093 - 2⁴ = 215077 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 (215063) 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, 3680 + ... + 3737.

It is an arithmetic number, because the mean of its divisors is an integer number (55635).

2²¹⁵⁰⁹³ is an apocalyptic number.

It is an amenable number.

215093 is a deficient number, since it is larger than the sum of its proper divisors (7447).

215093 is an equidigital number, since it uses as much as digits as its factorization.

215093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 215093 is about 463.7811984115. The cubic root of 215093 is about 59.9159006954.

It can be divided in two parts, 21509 and 3, that added together give a palindrome (21512).

The spelling of 215093 in words is "two hundred fifteen thousand, ninety-three".