161223495 has 32 divisors (see below), whose sum is σ = 273860352. Its totient is φ = 80712192.

The previous prime is 161223481. The next prime is 161223511. The reversal of 161223495 is 594322161.

It is not a de Polignac number, because 161223495 - 2⁴ = 161223479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143004 + ... + 144126.

It is an arithmetic number, because the mean of its divisors is an integer number (8558136).

Almost surely, 2^161223495 is an apocalyptic number.

161223495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161223495 is a deficient number, since it is larger than the sum of its proper divisors (112636857).

161223495 is a wasteful number, since it uses less digits than its factorization.

161223495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its digits is 12960, while the sum is 33.

The square root of 161223495 is about 12697.3814229549. The cubic root of 161223495 is about 544.2637928653.

The spelling of 161223495 in words is "one hundred sixty-one million, two hundred twenty-three thousand, four hundred ninety-five".