8021651253 has 16 divisors (see below), whose sum is σ = 13334693376. Its totient is φ = 4167091440.

The previous prime is 8021651251. The next prime is 8021651293. The reversal of 8021651253 is 3521561208.

It is not a de Polignac number, because 8021651253 - 2¹ = 8021651251 is a prime.

It is a super-4 number, since 4×8021651253⁴ (a number of 41 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021651251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17362651 + ... + 17363112.

It is an arithmetic number, because the mean of its divisors is an integer number (833418336).

Almost surely, 2^8021651253 is an apocalyptic number.

It is an amenable number.

8021651253 is a deficient number, since it is larger than the sum of its proper divisors (5313042123).

8021651253 is a wasteful number, since it uses less digits than its factorization.

8021651253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34725784.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 8021651253 is about 89563.6715024568. The cubic root of 8021651253 is about 2001.8026458292.

The spelling of 8021651253 in words is "eight billion, twenty-one million, six hundred fifty-one thousand, two hundred fifty-three".