161530807 has 2 divisors, whose sum is σ = 161530808. Its totient is φ = 161530806.

The previous prime is 161530793. The next prime is 161530829. The reversal of 161530807 is 708035161.

161530807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161530807 is a prime.

It is a super-2 number, since 2×161530807² = 52184403220142498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161530847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80765403 + 80765404.

It is an arithmetic number, because the mean of its divisors is an integer number (80765404).

Almost surely, 2^161530807 is an apocalyptic number.

161530807 is a deficient number, since it is larger than the sum of its proper divisors (1).

161530807 is an equidigital number, since it uses as much as digits as its factorization.

161530807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 161530807 is about 12709.4770545448. The cubic root of 161530807 is about 544.6093848340.

Adding to 161530807 its reverse (708035161), we get a palindrome (869565968).

The spelling of 161530807 in words is "one hundred sixty-one million, five hundred thirty thousand, eight hundred seven".