351545561 has 2 divisors, whose sum is σ = 351545562. Its totient is φ = 351545560.

The previous prime is 351545539. The next prime is 351545563. The reversal of 351545561 is 165545153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235315600 + 116229961 = 15340^2 + 10781^2 .

It is a cyclic number.

It is not a de Polignac number, because 351545561 - 2¹⁴ = 351529177 is a prime.

Together with 351545563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (351545563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175772780 + 175772781.

It is an arithmetic number, because the mean of its divisors is an integer number (175772781).

Almost surely, 2^351545561 is an apocalyptic number.

It is an amenable number.

351545561 is a deficient number, since it is larger than the sum of its proper divisors (1).

351545561 is an equidigital number, since it uses as much as digits as its factorization.

351545561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 35.

The square root of 351545561 is about 18749.5482878922. The cubic root of 351545561 is about 705.7656862188.

The spelling of 351545561 in words is "three hundred fifty-one million, five hundred forty-five thousand, five hundred sixty-one".