161430523 has 2 divisors, whose sum is σ = 161430524. Its totient is φ = 161430522.

The previous prime is 161430509. The next prime is 161430541. The reversal of 161430523 is 325034161.

It is a weak prime.

It is an emirp because it is prime and its reverse (325034161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161430523 - 2²¹ = 159333371 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (161430323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80715261 + 80715262.

It is an arithmetic number, because the mean of its divisors is an integer number (80715262).

Almost surely, 2^161430523 is an apocalyptic number.

161430523 is a deficient number, since it is larger than the sum of its proper divisors (1).

161430523 is an equidigital number, since it uses as much as digits as its factorization.

161430523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 161430523 is about 12705.5311970811. The cubic root of 161430523 is about 544.4966572891.

Adding to 161430523 its reverse (325034161), we get a palindrome (486464684).

The spelling of 161430523 in words is "one hundred sixty-one million, four hundred thirty thousand, five hundred twenty-three".