5215123212 has 96 divisors (see below), whose sum is σ = 13644318912. Its totient is φ = 1539772416.

The previous prime is 5215123189. The next prime is 5215123219. The reversal of 5215123212 is 2123215125.

It is not an unprimeable number, because it can be changed into a prime (5215123219) 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 31 ways as a sum of consecutive naturals, for example, 415168 + ... + 427544.

It is an arithmetic number, because the mean of its divisors is an integer number (142128322).

Almost surely, 2^5215123212 is an apocalyptic number.

5215123212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5215123212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6822159456).

5215123212 is an abundant number, since it is smaller than the sum of its proper divisors (8429195700).

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

5215123212 is a wasteful number, since it uses less digits than its factorization.

5215123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12507 (or 12505 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 5215123212 is about 72215.8099864566. The cubic root of 5215123212 is about 1734.1561130131.

Adding to 5215123212 its reverse (2123215125), we get a palindrome (7338338337).

The spelling of 5215123212 in words is "five billion, two hundred fifteen million, one hundred twenty-three thousand, two hundred twelve".