215020233553 has 4 divisors (see below), whose sum is σ = 215023469680. Its totient is φ = 215016997428.

The previous prime is 215020233497. The next prime is 215020233557. The reversal of 215020233553 is 355332020512.

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 a cyclic number.

It is not a de Polignac number, because 215020233553 - 2²¹ = 215018136401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215020233557) 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, 1516263 + ... + 1651996.

It is an arithmetic number, because the mean of its divisors is an integer number (53755867420).

Almost surely, 2^215020233553 is an apocalyptic number.

It is an amenable number.

215020233553 is a deficient number, since it is larger than the sum of its proper divisors (3236127).

215020233553 is an equidigital number, since it uses as much as digits as its factorization.

215020233553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236126.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 215020233553 in words is "two hundred fifteen billion, twenty million, two hundred thirty-three thousand, five hundred fifty-three".