350520421 has 2 divisors, whose sum is σ = 350520422. Its totient is φ = 350520420.

The previous prime is 350520389. The next prime is 350520473. The reversal of 350520421 is 124025053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332150625 + 18369796 = 18225^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 350520421 - 2⁵ = 350520389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 350520392 and 350520401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (350523421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175260210 + 175260211.

It is an arithmetic number, because the mean of its divisors is an integer number (175260211).

Almost surely, 2^350520421 is an apocalyptic number.

It is an amenable number.

350520421 is a deficient number, since it is larger than the sum of its proper divisors (1).

350520421 is an equidigital number, since it uses as much as digits as its factorization.

350520421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 350520421 is about 18722.1906036660. The cubic root of 350520421 is about 705.0789918700.

Adding to 350520421 its reverse (124025053), we get a palindrome (474545474).

The spelling of 350520421 in words is "three hundred fifty million, five hundred twenty thousand, four hundred twenty-one".