82421553 has 8 divisors (see below), whose sum is σ = 111697216. Its totient is φ = 54046800.

The previous prime is 82421551. The next prime is 82421561. The reversal of 82421553 is 35512428.

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

It is not a de Polignac number, because 82421553 - 2¹ = 82421551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82421553.

It is not an unprimeable number, because it can be changed into a prime (82421551) 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, 225013 + ... + 225378.

It is an arithmetic number, because the mean of its divisors is an integer number (13962152).

Almost surely, 2^82421553 is an apocalyptic number.

It is an amenable number.

82421553 is a deficient number, since it is larger than the sum of its proper divisors (29275663).

82421553 is a wasteful number, since it uses less digits than its factorization.

82421553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450455.

The product of its digits is 9600, while the sum is 30.

The square root of 82421553 is about 9078.6316700261. The cubic root of 82421553 is about 435.1913598551.

The spelling of 82421553 in words is "eighty-two million, four hundred twenty-one thousand, five hundred fifty-three".