161245227 has 32 divisors (see below), whose sum is σ = 258483456. Its totient is φ = 88099200.

The previous prime is 161245211. The next prime is 161245283. The reversal of 161245227 is 722542161.

It is not a de Polignac number, because 161245227 - 2⁴ = 161245211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161245194 and 161245203.

It is not an unprimeable number, because it can be changed into a prime (161245327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14077 + ... + 22817.

It is an arithmetic number, because the mean of its divisors is an integer number (8077608).

Almost surely, 2^161245227 is an apocalyptic number.

161245227 is a deficient number, since it is larger than the sum of its proper divisors (97238229).

161245227 is a wasteful number, since it uses less digits than its factorization.

161245227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811.

The product of its digits is 6720, while the sum is 30.

The square root of 161245227 is about 12698.2371611181. The cubic root of 161245227 is about 544.2882463098.

Adding to 161245227 its reverse (722542161), we get a palindrome (883787388).

The spelling of 161245227 in words is "one hundred sixty-one million, two hundred forty-five thousand, two hundred twenty-seven".