5515210221 has 8 divisors (see below), whose sum is σ = 7402313664. Its totient is φ = 3652456800.

The previous prime is 5515210213. The next prime is 5515210223. The reversal of 5515210221 is 1220125155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5515210221 - 2³ = 5515210213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5515210191 and 5515210200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515210223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6086976 + ... + 6087881.

It is an arithmetic number, because the mean of its divisors is an integer number (925289208).

Almost surely, 2^5515210221 is an apocalyptic number.

It is an amenable number.

5515210221 is a deficient number, since it is larger than the sum of its proper divisors (1887103443).

5515210221 is a wasteful number, since it uses less digits than its factorization.

5515210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175011.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 5515210221 is about 74264.4613593878. The cubic root of 5515210221 is about 1766.7998632497.

Adding to 5515210221 its reverse (1220125155), we get a palindrome (6735335376).

The spelling of 5515210221 in words is "five billion, five hundred fifteen million, two hundred ten thousand, two hundred twenty-one".