2057221477 has 2 divisors, whose sum is σ = 2057221478. Its totient is φ = 2057221476.

The previous prime is 2057221469. The next prime is 2057221489. The reversal of 2057221477 is 7741227502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671256161 + 385965316 = 40881^2 + 19646^2 .

It is a cyclic number.

It is not a de Polignac number, because 2057221477 - 2³ = 2057221469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2057221457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028610738 + 1028610739.

It is an arithmetic number, because the mean of its divisors is an integer number (1028610739).

Almost surely, 2^2057221477 is an apocalyptic number.

It is an amenable number.

2057221477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057221477 is an equidigital number, since it uses as much as digits as its factorization.

2057221477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 2057221477 is about 45356.6034552853. The cubic root of 2057221477 is about 1271.8240013092.

Adding to 2057221477 its reverse (7741227502), we get a palindrome (9798448979).

The spelling of 2057221477 in words is "two billion, fifty-seven million, two hundred twenty-one thousand, four hundred seventy-seven".