353620421 has 16 divisors (see below), whose sum is σ = 446197248. Its totient is φ = 272223600.

The previous prime is 353620391. The next prime is 353620471. The reversal of 353620421 is 124026353.

It is a de Polignac number, because none of the positive numbers 2^k-353620421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353620471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21275 + ... + 34056.

It is an arithmetic number, because the mean of its divisors is an integer number (27887328).

Almost surely, 2^353620421 is an apocalyptic number.

It is an amenable number.

353620421 is a deficient number, since it is larger than the sum of its proper divisors (92576827).

353620421 is a wasteful number, since it uses less digits than its factorization.

353620421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55432.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 353620421 is about 18804.7978186419. The cubic root of 353620421 is about 707.1514653006.

Adding to 353620421 its reverse (124026353), we get a palindrome (477646774).

The spelling of 353620421 in words is "three hundred fifty-three million, six hundred twenty thousand, four hundred twenty-one".