2155757069 has 2 divisors, whose sum is σ = 2155757070. Its totient is φ = 2155757068.

The previous prime is 2155757053. The next prime is 2155757089. The reversal of 2155757069 is 9607575512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1409101444 + 746655625 = 37538^2 + 27325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155757069 - 2⁴ = 2155757053 is a prime.

It is a super-2 number, since 2×2155757069² = 9294577081086941522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155757089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077878534 + 1077878535.

It is an arithmetic number, because the mean of its divisors is an integer number (1077878535).

Almost surely, 2^2155757069 is an apocalyptic number.

It is an amenable number.

2155757069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155757069 is an equidigital number, since it uses as much as digits as its factorization.

2155757069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 661500, while the sum is 47.

The square root of 2155757069 is about 46430.1310465521. The cubic root of 2155757069 is about 1291.8138594234.

The spelling of 2155757069 in words is "two billion, one hundred fifty-five million, seven hundred fifty-seven thousand, sixty-nine".