345555541 has 2 divisors, whose sum is σ = 345555542. Its totient is φ = 345555540.

The previous prime is 345555493. The next prime is 345555547. The reversal of 345555541 is 145555543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343027441 + 2528100 = 18521^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 345555541 - 2¹¹ = 345553493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345555541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345555547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172777770 + 172777771.

It is an arithmetic number, because the mean of its divisors is an integer number (172777771).

Almost surely, 2^345555541 is an apocalyptic number.

It is an amenable number.

345555541 is a deficient number, since it is larger than the sum of its proper divisors (1).

345555541 is an equidigital number, since it uses as much as digits as its factorization.

345555541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150000, while the sum is 37.

The square root of 345555541 is about 18589.1242666243. The cubic root of 345555541 is about 701.7341635416.

It can be divided in two parts, 3455 and 55541, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 345555541 in words is "three hundred forty-five million, five hundred fifty-five thousand, five hundred forty-one".