215453 has 6 divisors (see below), whose sum is σ = 250686. Its totient is φ = 184632.

The previous prime is 215447. The next prime is 215459. The reversal of 215453 is 354512.

It is an interprime number because it is at equal distance from previous prime (215447) and next prime (215459).

It can be written as a sum of positive squares in only one way, i.e., 182329 + 33124 = 427^2 + 182^2 .

It is not a de Polignac number, because 215453 - 2⁶ = 215389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2150 + ... + 2247.

It is an arithmetic number, because the mean of its divisors is an integer number (41781).

2²¹⁵⁴⁵³ is an apocalyptic number.

It is an amenable number.

215453 is a deficient number, since it is larger than the sum of its proper divisors (35233).

215453 is an equidigital number, since it uses as much as digits as its factorization.

215453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411 (or 4404 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 215453 is about 464.1691502028. The cubic root of 215453 is about 59.9493090377.

Adding to 215453 its reverse (354512), we get a palindrome (569965).

The spelling of 215453 in words is "two hundred fifteen thousand, four hundred fifty-three".