8221957464 has 32 divisors (see below), whose sum is σ = 23491307520. Its totient is φ = 2349130656.

The previous prime is 8221957463. The next prime is 8221957483. The reversal of 8221957464 is 4647591228.

It is a super-2 number, since 2×8221957464² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221957463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24469944 + ... + 24470279.

It is an arithmetic number, because the mean of its divisors is an integer number (734103360).

Almost surely, 2^8221957464 is an apocalyptic number.

8221957464 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8221957464 is an abundant number, since it is smaller than the sum of its proper divisors (15269350056).

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

8221957464 is a wasteful number, since it uses less digits than its factorization.

8221957464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48940239 (or 48940235 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 8221957464 is about 90675.0101406115. The cubic root of 8221957464 is about 2018.3279847667.

The spelling of 8221957464 in words is "eight billion, two hundred twenty-one million, nine hundred fifty-seven thousand, four hundred sixty-four".