351222401 has 2 divisors, whose sum is σ = 351222402. Its totient is φ = 351222400.

The previous prime is 351222373. The next prime is 351222449. The reversal of 351222401 is 104222153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223532401 + 127690000 = 14951^2 + 11300^2 .

It is a cyclic number.

It is not a de Polignac number, because 351222401 - 2⁶ = 351222337 is a prime.

It is not a weakly prime, because it can be changed into another prime (351222461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175611200 + 175611201.

It is an arithmetic number, because the mean of its divisors is an integer number (175611201).

Almost surely, 2^351222401 is an apocalyptic number.

It is an amenable number.

351222401 is a deficient number, since it is larger than the sum of its proper divisors (1).

351222401 is an equidigital number, since it uses as much as digits as its factorization.

351222401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 351222401 is about 18740.9284988765. The cubic root of 351222401 is about 705.5493603836.

Adding to 351222401 its reverse (104222153), we get a palindrome (455444554).

The spelling of 351222401 in words is "three hundred fifty-one million, two hundred twenty-two thousand, four hundred one".