355228409 has 2 divisors, whose sum is σ = 355228410. Its totient is φ = 355228408.

The previous prime is 355228373. The next prime is 355228429. The reversal of 355228409 is 904822553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316128400 + 39100009 = 17780^2 + 6253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355228409 is a prime.

It is not a weakly prime, because it can be changed into another prime (355228429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177614204 + 177614205.

It is an arithmetic number, because the mean of its divisors is an integer number (177614205).

Almost surely, 2^355228409 is an apocalyptic number.

It is an amenable number.

355228409 is a deficient number, since it is larger than the sum of its proper divisors (1).

355228409 is an equidigital number, since it uses as much as digits as its factorization.

355228409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 355228409 is about 18847.5040522611. The cubic root of 355228409 is about 708.2217012668.

The spelling of 355228409 in words is "three hundred fifty-five million, two hundred twenty-eight thousand, four hundred nine".