355016421 has 12 divisors (see below), whose sum is σ = 513365580. Its totient is φ = 236417280.

The previous prime is 355016353. The next prime is 355016429. The reversal of 355016421 is 124610553.

It can be written as a sum of positive squares in 2 ways, for example, as 193599396 + 161417025 = 13914^2 + 12705^2 .

It is not a de Polignac number, because 355016421 - 2¹⁹ = 354492133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355016429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12870 + ... + 29591.

It is an arithmetic number, because the mean of its divisors is an integer number (42780465).

Almost surely, 2^355016421 is an apocalyptic number.

It is an amenable number.

355016421 is a deficient number, since it is larger than the sum of its proper divisors (158349159).

355016421 is a wasteful number, since it uses less digits than its factorization.

355016421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43396 (or 43393 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 355016421 is about 18841.8794444716. The cubic root of 355016421 is about 708.0807925133.

Adding to 355016421 its reverse (124610553), we get a palindrome (479626974).

The spelling of 355016421 in words is "three hundred fifty-five million, sixteen thousand, four hundred twenty-one".