2155057 has 2 divisors, whose sum is σ = 2155058. Its totient is φ = 2155056.

The previous prime is 2155009. The next prime is 2155067. The reversal of 2155057 is 7505512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1147041 + 1008016 = 1071^2 + 1004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155057 is a prime.

2155057 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2155007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077528 + 1077529.

It is an arithmetic number, because the mean of its divisors is an integer number (1077529).

2^2155057 is an apocalyptic number.

It is an amenable number.

2155057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155057 is an equidigital number, since it uses as much as digits as its factorization.

2155057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 2155057 is about 1468.0112397390. The cubic root of 2155057 is about 129.1674008052.

It can be divided in two parts, 215505 and 7, that added together give a palindrome (215512).

The spelling of 2155057 in words is "two million, one hundred fifty-five thousand, fifty-seven".