161770214233 has 4 divisors (see below), whose sum is σ = 161772556468. Its totient is φ = 161767872000.

The previous prime is 161770214231. The next prime is 161770214251. The reversal of 161770214233 is 332412077161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40758764544 + 121011449689 = 201888^2 + 347867^2 .

It is a cyclic number.

It is not a de Polignac number, because 161770214233 - 2¹ = 161770214231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161770214192 and 161770214201.

It is not an unprimeable number, because it can be changed into a prime (161770214231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064268 + ... + 1206733.

It is an arithmetic number, because the mean of its divisors is an integer number (40443139117).

Almost surely, 2^161770214233 is an apocalyptic number.

It is an amenable number.

161770214233 is a deficient number, since it is larger than the sum of its proper divisors (2342235).

161770214233 is an equidigital number, since it uses as much as digits as its factorization.

161770214233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342234.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 161770214233 in words is "one hundred sixty-one billion, seven hundred seventy million, two hundred fourteen thousand, two hundred thirty-three".