8210572621 has 4 divisors (see below), whose sum is σ = 8314504000. Its totient is φ = 8106641244.

The previous prime is 8210572589. The next prime is 8210572627. The reversal of 8210572621 is 1262750128.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8210572621 - 2⁵ = 8210572589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8210572627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51965571 + ... + 51965728.

It is an arithmetic number, because the mean of its divisors is an integer number (2078626000).

Almost surely, 2^8210572621 is an apocalyptic number.

It is an amenable number.

8210572621 is a deficient number, since it is larger than the sum of its proper divisors (103931379).

8210572621 is a wasteful number, since it uses less digits than its factorization.

8210572621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103931378.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 8210572621 is about 90612.2101098963. The cubic root of 8210572621 is about 2017.3959698364.

The spelling of 8210572621 in words is "eight billion, two hundred ten million, five hundred seventy-two thousand, six hundred twenty-one".