161430541 has 2 divisors, whose sum is σ = 161430542. Its totient is φ = 161430540.

The previous prime is 161430523. The next prime is 161430551. The reversal of 161430541 is 145034161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 19105641 = 11930^2 + 4371^2 .

It is a cyclic number.

It is not a de Polignac number, because 161430541 - 2⁵ = 161430509 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161430551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80715270 + 80715271.

It is an arithmetic number, because the mean of its divisors is an integer number (80715271).

Almost surely, 2^161430541 is an apocalyptic number.

It is an amenable number.

161430541 is a deficient number, since it is larger than the sum of its proper divisors (1).

161430541 is an equidigital number, since it uses as much as digits as its factorization.

161430541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 161430541 is about 12705.5319054339. The cubic root of 161430541 is about 544.4966775268.

The spelling of 161430541 in words is "one hundred sixty-one million, four hundred thirty thousand, five hundred forty-one".