356016421 has 2 divisors, whose sum is σ = 356016422. Its totient is φ = 356016420.

The previous prime is 356016377. The next prime is 356016449. The reversal of 356016421 is 124610653.

It is an a-pointer prime, because the next prime (356016449) can be obtained adding 356016421 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301404321 + 54612100 = 17361^2 + 7390^2 .

It is a cyclic number.

It is not a de Polignac number, because 356016421 - 2⁷ = 356016293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 356016421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356016461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178008210 + 178008211.

It is an arithmetic number, because the mean of its divisors is an integer number (178008211).

Almost surely, 2^356016421 is an apocalyptic number.

It is an amenable number.

356016421 is a deficient number, since it is larger than the sum of its proper divisors (1).

356016421 is an equidigital number, since it uses as much as digits as its factorization.

356016421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 356016421 is about 18868.3974147250. The cubic root of 356016421 is about 708.7450031012.

The spelling of 356016421 in words is "three hundred fifty-six million, sixteen thousand, four hundred twenty-one".