161152031 has 4 divisors (see below), whose sum is σ = 162630600. Its totient is φ = 159673464.

The previous prime is 161152001. The next prime is 161152081. The reversal of 161152031 is 130251161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130251161 = 17 ⋅7661833.

It is a cyclic number.

It is not a de Polignac number, because 161152031 - 2⁶ = 161151967 is a prime.

It is a super-2 number, since 2×161152031² = 51939954190849922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161151994 and 161152012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161152001) 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 3 ways as a sum of consecutive naturals, for example, 739121 + ... + 739338.

It is an arithmetic number, because the mean of its divisors is an integer number (40657650).

Almost surely, 2^161152031 is an apocalyptic number.

161152031 is a deficient number, since it is larger than the sum of its proper divisors (1478569).

161152031 is a wasteful number, since it uses less digits than its factorization.

161152031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478568.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 161152031 is about 12694.5669874951. The cubic root of 161152031 is about 544.1833641081.

The spelling of 161152031 in words is "one hundred sixty-one million, one hundred fifty-two thousand, thirty-one".