5511021830 has 32 divisors (see below), whose sum is σ = 10083139200. Its totient is φ = 2168330112.

The previous prime is 5511021731. The next prime is 5511021889. The reversal of 5511021830 is 381201155.

It is a happy number.

It is a super-2 number, since 2×5511021830² = 60742723221473097800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5511021830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199544 + ... + 225476.

It is an arithmetic number, because the mean of its divisors is an integer number (315098100).

Almost surely, 2^5511021830 is an apocalyptic number.

5511021830 is a deficient number, since it is larger than the sum of its proper divisors (4572117370).

5511021830 is a wasteful number, since it uses less digits than its factorization.

5511021830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26288.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 5511021830 is about 74236.2568425968. The cubic root of 5511021830 is about 1766.3524990573.

Adding to 5511021830 its reverse (381201155), we get a palindrome (5892222985).

The spelling of 5511021830 in words is "five billion, five hundred eleven million, twenty-one thousand, eight hundred thirty".