215200453 has 4 divisors (see below), whose sum is σ = 231754348. Its totient is φ = 198646560.

The previous prime is 215200439. The next prime is 215200471. The reversal of 215200453 is 354002512.

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 134954689 + 80245764 = 11617^2 + 8958^2 .

It is a cyclic number.

It is not a de Polignac number, because 215200453 - 2⁵ = 215200421 is a prime.

It is a super-2 number, since 2×215200453² = 92622469942810418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215200483) 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, 8276928 + ... + 8276953.

It is an arithmetic number, because the mean of its divisors is an integer number (57938587).

Almost surely, 2^215200453 is an apocalyptic number.

It is an amenable number.

215200453 is a deficient number, since it is larger than the sum of its proper divisors (16553895).

215200453 is a wasteful number, since it uses less digits than its factorization.

215200453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16553894.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 215200453 is about 14669.7120966977. The cubic root of 215200453 is about 599.2587633612.

Adding to 215200453 its reverse (354002512), we get a palindrome (569202965).

The spelling of 215200453 in words is "two hundred fifteen million, two hundred thousand, four hundred fifty-three".