161229106 has 4 divisors (see below), whose sum is σ = 241843662. Its totient is φ = 80614552.

The previous prime is 161229049. The next prime is 161229121. The reversal of 161229106 is 601922161.

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

It can be written as a sum of positive squares in only one way, i.e., 126360081 + 34869025 = 11241^2 + 5905^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40307275 + ... + 40307278.

Almost surely, 2^161229106 is an apocalyptic number.

161229106 is a deficient number, since it is larger than the sum of its proper divisors (80614556).

161229106 is an equidigital number, since it uses as much as digits as its factorization.

161229106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80614555.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 161229106 is about 12697.6023721016. The cubic root of 161229106 is about 544.2701067274.

The spelling of 161229106 in words is "one hundred sixty-one million, two hundred twenty-nine thousand, one hundred six".