82252621 has 4 divisors (see below), whose sum is σ = 89730144. Its totient is φ = 74775100.

The previous prime is 82252609. The next prime is 82252627. The reversal of 82252621 is 12625228.

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 82252621 - 2⁵ = 82252589 is a prime.

It is a super-2 number, since 2×82252621² = 13530987322739282, which contains 22 as substring.

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 82252621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82252627) 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, 3738745 + ... + 3738766.

It is an arithmetic number, because the mean of its divisors is an integer number (22432536).

Almost surely, 2^82252621 is an apocalyptic number.

It is an amenable number.

82252621 is a deficient number, since it is larger than the sum of its proper divisors (7477523).

82252621 is a wasteful number, since it uses less digits than its factorization.

82252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477522.

The product of its digits is 3840, while the sum is 28.

The square root of 82252621 is about 9069.3230728649. The cubic root of 82252621 is about 434.8938323721.

Adding to 82252621 its reverse (12625228), we get a palindrome (94877849).

The spelling of 82252621 in words is "eighty-two million, two hundred fifty-two thousand, six hundred twenty-one".