215120553 has 12 divisors (see below), whose sum is σ = 294794640. Its totient is φ = 139534992.

The previous prime is 215120537. The next prime is 215120569. The reversal of 215120553 is 355021512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215120537) and next prime (215120569).

It is not a de Polignac number, because 215120553 - 2⁴ = 215120537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215120513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22083 + ... + 30296.

It is an arithmetic number, because the mean of its divisors is an integer number (24566220).

Almost surely, 2^215120553 is an apocalyptic number.

It is an amenable number.

215120553 is a deficient number, since it is larger than the sum of its proper divisors (79674087).

215120553 is an equidigital number, since it uses as much as digits as its factorization.

215120553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52456 (or 52419 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 215120553 is about 14666.9885457104. The cubic root of 215120553 is about 599.1845895673.

The spelling of 215120553 in words is "two hundred fifteen million, one hundred twenty thousand, five hundred fifty-three".