5111231550 has 96 divisors (see below), whose sum is σ = 13066247040. Its totient is φ = 1321488000.

The previous prime is 5111231539. The next prime is 5111231561. The reversal of 5111231550 is 551321115.

It is an interprime number because it is at equal distance from previous prime (5111231539) and next prime (5111231561).

It is a super-2 number, since 2×5111231550² = 52249375915430805000, 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 5111231550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 893700 + ... + 899400.

It is an arithmetic number, because the mean of its divisors is an integer number (136106740).

Almost surely, 2^5111231550 is an apocalyptic number.

5111231550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5111231550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6533123520).

5111231550 is an abundant number, since it is smaller than the sum of its proper divisors (7955015490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5111231550 is a wasteful number, since it uses less digits than its factorization.

5111231550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898 (or 5893 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 5111231550 is about 71492.8776172844. The cubic root of 5111231550 is about 1722.5632808106.

Adding to 5111231550 its reverse (551321115), we get a palindrome (5662552665).

The spelling of 5111231550 in words is "five billion, one hundred eleven million, two hundred thirty-one thousand, five hundred fifty".