354155561 has 2 divisors, whose sum is σ = 354155562. Its totient is φ = 354155560.

The previous prime is 354155533. The next prime is 354155621. The reversal of 354155561 is 165551453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336355600 + 17799961 = 18340^2 + 4219^2 .

It is a cyclic number.

It is not a de Polignac number, because 354155561 - 2¹⁸ = 353893417 is a prime.

It is a super-2 number, since 2×354155561² = 250852322774449442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (354155261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177077780 + 177077781.

It is an arithmetic number, because the mean of its divisors is an integer number (177077781).

Almost surely, 2^354155561 is an apocalyptic number.

It is an amenable number.

354155561 is a deficient number, since it is larger than the sum of its proper divisors (1).

354155561 is an equidigital number, since it uses as much as digits as its factorization.

354155561 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 354155561 is about 18819.0212551025. The cubic root of 354155561 is about 707.5080004256.

The spelling of 354155561 in words is "three hundred fifty-four million, one hundred fifty-five thousand, five hundred sixty-one".