161222702 has 4 divisors (see below), whose sum is σ = 241834056. Its totient is φ = 80611350.

The previous prime is 161222693. The next prime is 161222741. The reversal of 161222702 is 207222161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 207222161 = 2063 ⋅100447.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40305674 + ... + 40305677.

It is an arithmetic number, because the mean of its divisors is an integer number (60458514).

Almost surely, 2^161222702 is an apocalyptic number.

161222702 is a deficient number, since it is larger than the sum of its proper divisors (80611354).

161222702 is an equidigital number, since it uses as much as digits as its factorization.

161222702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80611353.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 161222702 is about 12697.3501960055. The cubic root of 161222702 is about 544.2629005184.

Adding to 161222702 its reverse (207222161), we get a palindrome (368444863).

The spelling of 161222702 in words is "one hundred sixty-one million, two hundred twenty-two thousand, seven hundred two".