57026621 has 4 divisors (see below), whose sum is σ = 57409500. Its totient is φ = 56643744.

The previous prime is 57026617. The next prime is 57026633. The reversal of 57026621 is 12662075.

57026621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 41925625 = 3886^2 + 6475^2 .

It is a cyclic number.

It is not a de Polignac number, because 57026621 - 2² = 57026617 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 (57022621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191216 + ... + 191513.

It is an arithmetic number, because the mean of its divisors is an integer number (14352375).

Almost surely, 2^57026621 is an apocalyptic number.

It is an amenable number.

57026621 is a deficient number, since it is larger than the sum of its proper divisors (382879).

57026621 is a wasteful number, since it uses less digits than its factorization.

57026621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382878.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 57026621 is about 7551.5972482648. The cubic root of 57026621 is about 384.9100166384.

Adding to 57026621 its reverse (12662075), we get a palindrome (69688696).

The spelling of 57026621 in words is "fifty-seven million, twenty-six thousand, six hundred twenty-one".