161306351 has 2 divisors, whose sum is σ = 161306352. Its totient is φ = 161306350.

The previous prime is 161306329. The next prime is 161306377. The reversal of 161306351 is 153603161.

It is an a-pointer prime, because the next prime (161306377) can be obtained adding 161306351 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (153603161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161306351 - 2¹⁰ = 161305327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161306351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161300351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80653175 + 80653176.

It is an arithmetic number, because the mean of its divisors is an integer number (80653176).

Almost surely, 2^161306351 is an apocalyptic number.

161306351 is a deficient number, since it is larger than the sum of its proper divisors (1).

161306351 is an equidigital number, since it uses as much as digits as its factorization.

161306351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 161306351 is about 12700.6437238433. The cubic root of 161306351 is about 544.3570129382.

The spelling of 161306351 in words is "one hundred sixty-one million, three hundred six thousand, three hundred fifty-one".