2030521555 has 4 divisors (see below), whose sum is σ = 2436625872. Its totient is φ = 1624417240.

The previous prime is 2030521553. The next prime is 2030521643. The reversal of 2030521555 is 5551250302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2030521555 - 2¹ = 2030521553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2030521553) 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, 203052151 + ... + 203052160.

It is an arithmetic number, because the mean of its divisors is an integer number (609156468).

Almost surely, 2^2030521555 is an apocalyptic number.

2030521555 is a deficient number, since it is larger than the sum of its proper divisors (406104317).

2030521555 is an equidigital number, since it uses as much as digits as its factorization.

2030521555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406104316.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 2030521555 is about 45061.3088469476. The cubic root of 2030521555 is about 1266.2978457201.

Adding to 2030521555 its reverse (5551250302), we get a palindrome (7581771857).

The spelling of 2030521555 in words is "two billion, thirty million, five hundred twenty-one thousand, five hundred fifty-five".