161151022 has 4 divisors (see below), whose sum is σ = 241726536. Its totient is φ = 80575510.

The previous prime is 161151017. The next prime is 161151037. The reversal of 161151022 is 220151161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220151161 = 3631 ⋅60631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40287754 + ... + 40287757.

It is an arithmetic number, because the mean of its divisors is an integer number (60431634).

Almost surely, 2^161151022 is an apocalyptic number.

161151022 is a deficient number, since it is larger than the sum of its proper divisors (80575514).

161151022 is an equidigital number, since it uses as much as digits as its factorization.

161151022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80575513.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 161151022 is about 12694.5272460222. The cubic root of 161151022 is about 544.1822283645.

The spelling of 161151022 in words is "one hundred sixty-one million, one hundred fifty-one thousand, twenty-two".