355121057 has 2 divisors, whose sum is σ = 355121058. Its totient is φ = 355121056.

The previous prime is 355121021. The next prime is 355121071. The reversal of 355121057 is 750121553.

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., 200392336 + 154728721 = 14156^2 + 12439^2 .

It is a cyclic number.

It is not a de Polignac number, because 355121057 - 2⁶ = 355120993 is a prime.

It is a super-2 number, since 2×355121057² = 252221930249594498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (355127057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177560528 + 177560529.

It is an arithmetic number, because the mean of its divisors is an integer number (177560529).

Almost surely, 2^355121057 is an apocalyptic number.

It is an amenable number.

355121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

355121057 is an equidigital number, since it uses as much as digits as its factorization.

355121057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 355121057 is about 18844.6559268138. The cubic root of 355121057 is about 708.1503512338.

The spelling of 355121057 in words is "three hundred fifty-five million, one hundred twenty-one thousand, fifty-seven".