215240053 has 4 divisors (see below), whose sum is σ = 245988640. Its totient is φ = 184491468.

The previous prime is 215240021. The next prime is 215240071. The reversal of 215240053 is 350042512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 215240053 - 2⁵ = 215240021 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 (215240093) 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, 15374283 + ... + 15374296.

It is an arithmetic number, because the mean of its divisors is an integer number (61497160).

Almost surely, 2^215240053 is an apocalyptic number.

It is an amenable number.

215240053 is a deficient number, since it is larger than the sum of its proper divisors (30748587).

215240053 is an equidigital number, since it uses as much as digits as its factorization.

215240053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30748586.

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

The square root of 215240053 is about 14671.0617543517. The cubic root of 215240053 is about 599.2955185372.

Adding to 215240053 its reverse (350042512), we get a palindrome (565282565).

The spelling of 215240053 in words is "two hundred fifteen million, two hundred forty thousand, fifty-three".