351121601 has 4 divisors (see below), whose sum is σ = 360611412. Its totient is φ = 341631792.

The previous prime is 351121579. The next prime is 351121609. The reversal of 351121601 is 106121153.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106121153 = 31 ⋅3423263.

It can be written as a sum of positive squares in 2 ways, for example, as 185613376 + 165508225 = 13624^2 + 12865^2 .

It is a cyclic number.

It is not a de Polignac number, because 351121601 - 2¹⁰ = 351120577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351121609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4744850 + ... + 4744923.

It is an arithmetic number, because the mean of its divisors is an integer number (90152853).

Almost surely, 2^351121601 is an apocalyptic number.

It is an amenable number.

351121601 is a deficient number, since it is larger than the sum of its proper divisors (9489811).

351121601 is an equidigital number, since it uses as much as digits as its factorization.

351121601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9489810.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 351121601 is about 18738.2390047731. The cubic root of 351121601 is about 705.4818569251.

Adding to 351121601 its reverse (106121153), we get a palindrome (457242754).

The spelling of 351121601 in words is "three hundred fifty-one million, one hundred twenty-one thousand, six hundred one".