5515230021 has 16 divisors (see below), whose sum is σ = 8455724544. Its totient is φ = 3132223344.

The previous prime is 5515230013. The next prime is 5515230031. The reversal of 5515230021 is 1200325155.

It is a happy number.

5515230021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5515230021 - 2³ = 5515230013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5515229973 and 5515230000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515230011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802191 + ... + 809036.

It is an arithmetic number, because the mean of its divisors is an integer number (528482784).

Almost surely, 2^5515230021 is an apocalyptic number.

It is an amenable number.

5515230021 is a deficient number, since it is larger than the sum of its proper divisors (2940494523).

5515230021 is a wasteful number, since it uses less digits than its factorization.

5515230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611400.

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

The square root of 5515230021 is about 74264.5946666377. The cubic root of 5515230021 is about 1766.8019775599.

Adding to 5515230021 its reverse (1200325155), we get a palindrome (6715555176).

The spelling of 5515230021 in words is "five billion, five hundred fifteen million, two hundred thirty thousand, twenty-one".