161652225 has 36 divisors (see below), whose sum is σ = 310907184. Its totient is φ = 73896480.

The previous prime is 161652193. The next prime is 161652287. The reversal of 161652225 is 522256161.

It is not a de Polignac number, because 161652225 - 2⁵ = 161652193 is a prime.

It is a super-2 number, since 2×161652225² = 52262883694901250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161652192 and 161652201.

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 in 35 ways as a sum of consecutive naturals, for example, 18319 + ... + 25668.

Almost surely, 2^161652225 is an apocalyptic number.

161652225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161652225 is a deficient number, since it is larger than the sum of its proper divisors (149254959).

161652225 is a wasteful number, since it uses less digits than its factorization.

161652225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44014 (or 44002 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 161652225 is about 12714.2528290104. The cubic root of 161652225 is about 544.7458063259.

The spelling of 161652225 in words is "one hundred sixty-one million, six hundred fifty-two thousand, two hundred twenty-five".