2106356257 has 2 divisors, whose sum is σ = 2106356258. Its totient is φ = 2106356256.

The previous prime is 2106356249. The next prime is 2106356267. The reversal of 2106356257 is 7526536012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191354256 + 915002001 = 34516^2 + 30249^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106356257 - 2³ = 2106356249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2106356267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053178128 + 1053178129.

It is an arithmetic number, because the mean of its divisors is an integer number (1053178129).

Almost surely, 2^2106356257 is an apocalyptic number.

It is an amenable number.

2106356257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106356257 is an equidigital number, since it uses as much as digits as its factorization.

2106356257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 2106356257 is about 45895.0569996378. The cubic root of 2106356257 is about 1281.8698779539.

The spelling of 2106356257 in words is "two billion, one hundred six million, three hundred fifty-six thousand, two hundred fifty-seven".