161225814 has 32 divisors (see below), whose sum is σ = 340277760. Its totient is φ = 50823872.

The previous prime is 161225809. The next prime is 161225833. The reversal of 161225814 is 418522161.

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 15 ways as a sum of consecutive naturals, for example, 5719 + ... + 18845.

It is an arithmetic number, because the mean of its divisors is an integer number (10633680).

Almost surely, 2^161225814 is an apocalyptic number.

161225814 is an abundant number, since it is smaller than the sum of its proper divisors (179051946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161225814 is a wasteful number, since it uses less digits than its factorization.

161225814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13244.

The product of its digits is 3840, while the sum is 30.

The square root of 161225814 is about 12697.4727406677. The cubic root of 161225814 is about 544.2664023727.

Adding to 161225814 its reverse (418522161), we get a palindrome (579747975).

The spelling of 161225814 in words is "one hundred sixty-one million, two hundred twenty-five thousand, eight hundred fourteen".