5215451111 has 4 divisors (see below), whose sum is σ = 5616639672. Its totient is φ = 4814262552.

The previous prime is 5215451099. The next prime is 5215451117. The reversal of 5215451111 is 1111545125.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5215451111 - 2¹⁸ = 5215188967 is a prime.

It is a super-2 number, since 2×5215451111² = 54401860582462268642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215451117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200594261 + ... + 200594286.

It is an arithmetic number, because the mean of its divisors is an integer number (1404159918).

Almost surely, 2^5215451111 is an apocalyptic number.

5215451111 is a deficient number, since it is larger than the sum of its proper divisors (401188561).

5215451111 is a wasteful number, since it uses less digits than its factorization.

5215451111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401188560.

The product of its digits is 1000, while the sum is 26.

The square root of 5215451111 is about 72218.0802223377. The cubic root of 5215451111 is about 1734.1924570658.

Adding to 5215451111 its reverse (1111545125), we get a palindrome (6326996236).

The spelling of 5215451111 in words is "five billion, two hundred fifteen million, four hundred fifty-one thousand, one hundred eleven".