351121403 has 2 divisors, whose sum is σ = 351121404. Its totient is φ = 351121402.

The previous prime is 351121399. The next prime is 351121423. The reversal of 351121403 is 304121153.

It is an a-pointer prime, because the next prime (351121423) can be obtained adding 351121403 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 351121403 - 2² = 351121399 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (351121423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175560701 + 175560702.

It is an arithmetic number, because the mean of its divisors is an integer number (175560702).

Almost surely, 2^351121403 is an apocalyptic number.

351121403 is a deficient number, since it is larger than the sum of its proper divisors (1).

351121403 is an equidigital number, since it uses as much as digits as its factorization.

351121403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 351121403 is about 18738.2337214584. The cubic root of 351121403 is about 705.4817243163.

Adding to 351121403 its reverse (304121153), we get a palindrome (655242556).

The spelling of 351121403 in words is "three hundred fifty-one million, one hundred twenty-one thousand, four hundred three".