351020561 has 2 divisors, whose sum is σ = 351020562. Its totient is φ = 351020560.

The previous prime is 351020491. The next prime is 351020627. The reversal of 351020561 is 165020153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219780625 + 131239936 = 14825^2 + 11456^2 .

It is a cyclic number.

It is not a de Polignac number, because 351020561 - 2¹⁴ = 351004177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (351020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175510280 + 175510281.

It is an arithmetic number, because the mean of its divisors is an integer number (175510281).

Almost surely, 2^351020561 is an apocalyptic number.

It is an amenable number.

351020561 is a deficient number, since it is larger than the sum of its proper divisors (1).

351020561 is an equidigital number, since it uses as much as digits as its factorization.

351020561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 351020561 is about 18735.5427196545. The cubic root of 351020561 is about 705.4141797773.

The spelling of 351020561 in words is "three hundred fifty-one million, twenty thousand, five hundred sixty-one".