161541547 has 2 divisors, whose sum is σ = 161541548. Its totient is φ = 161541546.

The previous prime is 161541511. The next prime is 161541551. The reversal of 161541547 is 745145161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161541547 - 2²⁷ = 27323819 is a prime.

It is not a weakly prime, because it can be changed into another prime (161541557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80770773 + 80770774.

It is an arithmetic number, because the mean of its divisors is an integer number (80770774).

Almost surely, 2^161541547 is an apocalyptic number.

161541547 is a deficient number, since it is larger than the sum of its proper divisors (1).

161541547 is an equidigital number, since it uses as much as digits as its factorization.

161541547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 161541547 is about 12709.8995668731. The cubic root of 161541547 is about 544.6214547198.

The spelling of 161541547 in words is "one hundred sixty-one million, five hundred forty-one thousand, five hundred forty-seven".