5115501111 has 8 divisors (see below), whose sum is σ = 7795049344. Its totient is φ = 2923143480.

The previous prime is 5115501107. The next prime is 5115501133. The reversal of 5115501111 is 1111055115.

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

It is not a de Polignac number, because 5115501111 - 2² = 5115501107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 243595291 = 5115501111 / (5 + 1 + 1 + 5 + 5 + 0 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5115501151) 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, 121797625 + ... + 121797666.

It is an arithmetic number, because the mean of its divisors is an integer number (974381168).

Almost surely, 2^5115501111 is an apocalyptic number.

5115501111 is a deficient number, since it is larger than the sum of its proper divisors (2679548233).

5115501111 is a wasteful number, since it uses less digits than its factorization.

5115501111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243595301.

The product of its (nonzero) digits is 125, while the sum is 21.

The square root of 5115501111 is about 71522.7314285465. The cubic root of 5115501111 is about 1723.0427831280.

Adding to 5115501111 its reverse (1111055115), we get a palindrome (6226556226).

The spelling of 5115501111 in words is "five billion, one hundred fifteen million, five hundred one thousand, one hundred eleven".