161335227 has 4 divisors (see below), whose sum is σ = 215113640. Its totient is φ = 107556816.

The previous prime is 161335211. The next prime is 161335297. The reversal of 161335227 is 722533161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 161335227 - 2⁴ = 161335211 is a prime.

It is a super-2 number, since 2×161335227² = 52058110942283058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161335194 and 161335203.

It is not an unprimeable number, because it can be changed into a prime (161335297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26889202 + ... + 26889207.

It is an arithmetic number, because the mean of its divisors is an integer number (53778410).

Almost surely, 2^161335227 is an apocalyptic number.

161335227 is a deficient number, since it is larger than the sum of its proper divisors (53778413).

161335227 is an equidigital number, since it uses as much as digits as its factorization.

161335227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53778412.

The product of its digits is 7560, while the sum is 30.

The square root of 161335227 is about 12701.7804657457. The cubic root of 161335227 is about 544.3894934019.

Adding to 161335227 its reverse (722533161), we get a palindrome (883868388).

The spelling of 161335227 in words is "one hundred sixty-one million, three hundred thirty-five thousand, two hundred twenty-seven".