161482831 has 4 divisors (see below), whose sum is σ = 161532072. Its totient is φ = 161433592.

The previous prime is 161482819. The next prime is 161482861. The reversal of 161482831 is 138284161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161482831 - 2¹¹ = 161480783 is a prime.

It is a super-2 number, since 2×161482831² = 52153409415549122, 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 (161482801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19321 + ... + 26386.

It is an arithmetic number, because the mean of its divisors is an integer number (40383018).

Almost surely, 2^161482831 is an apocalyptic number.

161482831 is a deficient number, since it is larger than the sum of its proper divisors (49241).

161482831 is an equidigital number, since it uses as much as digits as its factorization.

161482831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49240.

The product of its digits is 9216, while the sum is 34.

The square root of 161482831 is about 12707.5895039146. The cubic root of 161482831 is about 544.5554616484. Note that the first 3 decimals are identical.

The spelling of 161482831 in words is "one hundred sixty-one million, four hundred eighty-two thousand, eight hundred thirty-one".