353031421 has 2 divisors, whose sum is σ = 353031422. Its totient is φ = 353031420.

The previous prime is 353031409. The next prime is 353031433. The reversal of 353031421 is 124130353.

It is a balanced prime because it is at equal distance from previous prime (353031409) and next prime (353031433).

It can be written as a sum of positive squares in only one way, i.e., 353026521 + 4900 = 18789^2 + 70^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-353031421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 353031392 and 353031401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353031451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176515710 + 176515711.

It is an arithmetic number, because the mean of its divisors is an integer number (176515711).

Almost surely, 2^353031421 is an apocalyptic number.

It is an amenable number.

353031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

353031421 is an equidigital number, since it uses as much as digits as its factorization.

353031421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 353031421 is about 18789.1303949917. The cubic root of 353031421 is about 706.7586300701.

Adding to 353031421 its reverse (124130353), we get a palindrome (477161774).

The spelling of 353031421 in words is "three hundred fifty-three million, thirty-one thousand, four hundred twenty-one".