57220521893 has 4 divisors (see below), whose sum is σ = 57221000460. Its totient is φ = 57220043328.

The previous prime is 57220521859. The next prime is 57220521913. The reversal of 57220521893 is 39812502275.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53032102369 + 4188419524 = 230287^2 + 64718^2 .

It is a cyclic number.

It is not a de Polignac number, because 57220521893 - 2⁶ = 57220521829 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 (57220521823) 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, 110663 + ... + 355931.

It is an arithmetic number, because the mean of its divisors is an integer number (14305250115).

Almost surely, 2^57220521893 is an apocalyptic number.

It is an amenable number.

57220521893 is a deficient number, since it is larger than the sum of its proper divisors (478567).

57220521893 is a wasteful number, since it uses less digits than its factorization.

57220521893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478566.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 57220521893 in words is "fifty-seven billion, two hundred twenty million, five hundred twenty-one thousand, eight hundred ninety-three".