356454221 has 2 divisors, whose sum is σ = 356454222. Its totient is φ = 356454220.

The previous prime is 356454179. The next prime is 356454229. The reversal of 356454221 is 122454653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255552196 + 100902025 = 15986^2 + 10045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-356454221 is a prime.

It is a super-2 number, since 2×356454221² = 254119223337433682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356454229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178227110 + 178227111.

It is an arithmetic number, because the mean of its divisors is an integer number (178227111).

Almost surely, 2^356454221 is an apocalyptic number.

It is an amenable number.

356454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

356454221 is an equidigital number, since it uses as much as digits as its factorization.

356454221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 32.

The square root of 356454221 is about 18879.9952595333. The cubic root of 356454221 is about 709.0354030582.

The spelling of 356454221 in words is "three hundred fifty-six million, four hundred fifty-four thousand, two hundred twenty-one".