8221953 has 8 divisors (see below), whose sum is σ = 11046816. Its totient is φ = 5439200.

The previous prime is 8221949. The next prime is 8221963. The reversal of 8221953 is 3591228.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8221953 - 2² = 8221949 is a prime.

It is a super-2 number, since 2×8221953² = 135201022268418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8221953.

It is not an unprimeable number, because it can be changed into a prime (8221903) 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, 10068 + ... + 10853.

It is an arithmetic number, because the mean of its divisors is an integer number (1380852).

Almost surely, 2^8221953 is an apocalyptic number.

It is an amenable number.

8221953 is a deficient number, since it is larger than the sum of its proper divisors (2824863).

8221953 is a wasteful number, since it uses less digits than its factorization.

8221953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21055.

The product of its digits is 4320, while the sum is 30.

The square root of 8221953 is about 2867.3948106251. The cubic root of 8221953 is about 201.8327619492.

It can be divided in two parts, 822 and 1953, that added together give a triangular number (2775 = T₇₄).

The spelling of 8221953 in words is "eight million, two hundred twenty-one thousand, nine hundred fifty-three".