350556421 has 4 divisors (see below), whose sum is σ = 350639532. Its totient is φ = 350473312.

The previous prime is 350556419. The next prime is 350556433. The reversal of 350556421 is 124655053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124655053 = 1759 ⋅70867.

It can be written as a sum of positive squares in 2 ways, for example, as 292033921 + 58522500 = 17089^2 + 7650^2 .

It is a cyclic number.

It is not a de Polignac number, because 350556421 - 2¹ = 350556419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350556121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34870 + ... + 43783.

It is an arithmetic number, because the mean of its divisors is an integer number (87659883).

Almost surely, 2^350556421 is an apocalyptic number.

It is an amenable number.

350556421 is a deficient number, since it is larger than the sum of its proper divisors (83111).

350556421 is an equidigital number, since it uses as much as digits as its factorization.

350556421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83110.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 350556421 is about 18723.1520049376. The cubic root of 350556421 is about 705.1031292889.

The spelling of 350556421 in words is "three hundred fifty million, five hundred fifty-six thousand, four hundred twenty-one".