161922237 has 8 divisors (see below), whose sum is σ = 227259360. Its totient is φ = 102266640.

The previous prime is 161922227. The next prime is 161922247. The reversal of 161922237 is 732229161.

It is an interprime number because it is at equal distance from previous prime (161922227) and next prime (161922247).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-161922237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161922198 and 161922207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161922217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420314 + ... + 1420427.

It is an arithmetic number, because the mean of its divisors is an integer number (28407420).

Almost surely, 2^161922237 is an apocalyptic number.

It is an amenable number.

161922237 is a deficient number, since it is larger than the sum of its proper divisors (65337123).

161922237 is a wasteful number, since it uses less digits than its factorization.

161922237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840763.

The product of its digits is 9072, while the sum is 33.

The square root of 161922237 is about 12724.8668755315. The cubic root of 161922237 is about 545.0489387359.

The spelling of 161922237 in words is "one hundred sixty-one million, nine hundred twenty-two thousand, two hundred thirty-seven".