161443354 has 4 divisors (see below), whose sum is σ = 242165034. Its totient is φ = 80721676.

The previous prime is 161443351. The next prime is 161443367. The reversal of 161443354 is 453344161.

It is a happy number.

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., 159441129 + 2002225 = 12627^2 + 1415^2 .

It is not an unprimeable number, because it can be changed into a prime (161443351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40360837 + ... + 40360840.

Almost surely, 2^161443354 is an apocalyptic number.

161443354 is a deficient number, since it is larger than the sum of its proper divisors (80721680).

161443354 is an equidigital number, since it uses as much as digits as its factorization.

161443354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80721679.

The product of its digits is 17280, while the sum is 31.

The square root of 161443354 is about 12706.0361246142. The cubic root of 161443354 is about 544.5110830028.

The spelling of 161443354 in words is "one hundred sixty-one million, four hundred forty-three thousand, three hundred fifty-four".