5115361221 has 8 divisors (see below), whose sum is σ = 7578312960. Its totient is φ = 3410240796.

The previous prime is 5115361177. The next prime is 5115361247. The reversal of 5115361221 is 1221635115.

5115361221 is a `hidden beast` number, since 5 + 1 + 1 + 536 + 122 + 1 = 666.

It is not a de Polignac number, because 5115361221 - 2⁶ = 5115361157 is a prime.

It is a super-2 number, since 2×5115361221² = 52333840842621221682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 189457823 = 5115361221 / (5 + 1 + 1 + 5 + 3 + 6 + 1 + 2 + 2 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5115361271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94728885 + ... + 94728938.

It is an arithmetic number, because the mean of its divisors is an integer number (947289120).

Almost surely, 2^5115361221 is an apocalyptic number.

It is an amenable number.

5115361221 is a deficient number, since it is larger than the sum of its proper divisors (2462951739).

5115361221 is a wasteful number, since it uses less digits than its factorization.

5115361221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189457832 (or 189457826 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 5115361221 is about 71521.7534810214. The cubic root of 5115361221 is about 1723.0270767064.

Adding to 5115361221 its reverse (1221635115), we get a palindrome (6336996336).

The spelling of 5115361221 in words is "five billion, one hundred fifteen million, three hundred sixty-one thousand, two hundred twenty-one".