5215121253 has 20 divisors (see below), whose sum is σ = 7793441568. Its totient is φ = 3475430280.

The previous prime is 5215121213. The next prime is 5215121287. The reversal of 5215121253 is 3521215125.

5215121253 is a `hidden beast` number, since 5 + 21 + 512 + 125 + 3 = 666.

It is not a de Polignac number, because 5215121253 - 2²¹ = 5213024101 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 233200 + ... + 254582.

Almost surely, 2^5215121253 is an apocalyptic number.

It is an amenable number.

5215121253 is a deficient number, since it is larger than the sum of its proper divisors (2578320315).

5215121253 is a wasteful number, since it uses less digits than its factorization.

5215121253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24406 (or 24397 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 5215121253 is about 72215.7964229434. The cubic root of 5215121253 is about 1734.1558958746.

Adding to 5215121253 its reverse (3521215125), we get a palindrome (8736336378).

The spelling of 5215121253 in words is "five billion, two hundred fifteen million, one hundred twenty-one thousand, two hundred fifty-three".