161627122 has 4 divisors (see below), whose sum is σ = 242440686. Its totient is φ = 80813560.

The previous prime is 161627119. The next prime is 161627131. The reversal of 161627122 is 221726161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221726161 = 1279 ⋅173359.

It can be written as a sum of positive squares in only one way, i.e., 101425041 + 60202081 = 10071^2 + 7759^2 .

It is a super-2 number, since 2×161627122² = 52246653132005768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40406779 + ... + 40406782.

Almost surely, 2^161627122 is an apocalyptic number.

161627122 is a deficient number, since it is larger than the sum of its proper divisors (80813564).

161627122 is an equidigital number, since it uses as much as digits as its factorization.

161627122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80813563.

The product of its digits is 2016, while the sum is 28.

The square root of 161627122 is about 12713.2655914993. The cubic root of 161627122 is about 544.7176069782.

The spelling of 161627122 in words is "one hundred sixty-one million, six hundred twenty-seven thousand, one hundred twenty-two".