82057621 has 16 divisors (see below), whose sum is σ = 85929984. Its totient is φ = 78309504.

The previous prime is 82057607. The next prime is 82057711. The reversal of 82057621 is 12675028.

It is a cyclic number.

It is not a de Polignac number, because 82057621 - 2¹¹ = 82055573 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 (92057621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491280 + ... + 491446.

It is an arithmetic number, because the mean of its divisors is an integer number (5370624).

Almost surely, 2^82057621 is an apocalyptic number.

It is an amenable number.

82057621 is a deficient number, since it is larger than the sum of its proper divisors (3872363).

82057621 is a wasteful number, since it uses less digits than its factorization.

82057621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 82057621 is about 9058.5661668942. The cubic root of 82057621 is about 434.5498862820.

The spelling of 82057621 in words is "eighty-two million, fifty-seven thousand, six hundred twenty-one".