5215121172 has 36 divisors (see below), whose sum is σ = 13670916896. Its totient is φ = 1738373400.

The previous prime is 5215121117. The next prime is 5215121179. The reversal of 5215121172 is 2711215125.

5215121172 is a `hidden beast` number, since 521 + 5 + 121 + 17 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215121179) 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 11 ways as a sum of consecutive naturals, for example, 2681704 + ... + 2683647.

Almost surely, 2^5215121172 is an apocalyptic number.

It is an amenable number.

5215121172 is an abundant number, since it is smaller than the sum of its proper divisors (8455795724).

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

5215121172 is a wasteful number, since it uses less digits than its factorization.

5215121172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5365370 (or 5365356 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 5215121172 is about 72215.7958621242. The cubic root of 5215121172 is about 1734.1558868965.

Adding to 5215121172 its reverse (2711215125), we get a palindrome (7926336297).

The spelling of 5215121172 in words is "five billion, two hundred fifteen million, one hundred twenty-one thousand, one hundred seventy-two".