5215452661 has 24 divisors (see below), whose sum is σ = 5645604744. Its totient is φ = 4816097280.

The previous prime is 5215452647. The next prime is 5215452701. The reversal of 5215452661 is 1662545125.

It can be written as a sum of positive squares in 12 ways, for example, as 103917636 + 5111535025 = 10194^2 + 71495^2 .

It is not a de Polignac number, because 5215452661 - 2⁷ = 5215452533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5215452661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215452611) 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 23 ways as a sum of consecutive naturals, for example, 4915071 + ... + 4916131.

It is an arithmetic number, because the mean of its divisors is an integer number (235233531).

Almost surely, 2^5215452661 is an apocalyptic number.

It is an amenable number.

5215452661 is a deficient number, since it is larger than the sum of its proper divisors (430152083).

5215452661 is a wasteful number, since it uses less digits than its factorization.

5215452661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1384 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 5215452661 is about 72218.0909537216. The cubic root of 5215452661 is about 1734.1926288629.

Adding to 5215452661 its reverse (1662545125), we get a palindrome (6877997786).

The spelling of 5215452661 in words is "five billion, two hundred fifteen million, four hundred fifty-two thousand, six hundred sixty-one".