161572349 has 8 divisors (see below), whose sum is σ = 166709760. Its totient is φ = 156492000.

The previous prime is 161572343. The next prime is 161572351. The reversal of 161572349 is 943275161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161572349 is a prime.

It is a super-2 number, since 2×161572349² = 52211247922755602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161572343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8477 + ... + 19874.

It is an arithmetic number, because the mean of its divisors is an integer number (20838720).

Almost surely, 2^161572349 is an apocalyptic number.

It is an amenable number.

161572349 is a deficient number, since it is larger than the sum of its proper divisors (5137411).

161572349 is a wasteful number, since it uses less digits than its factorization.

161572349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28531.

The product of its digits is 45360, while the sum is 38.

The square root of 161572349 is about 12711.1112417444. Note that the first 3 decimals coincide. The cubic root of 161572349 is about 544.6560678255.

The spelling of 161572349 in words is "one hundred sixty-one million, five hundred seventy-two thousand, three hundred forty-nine".