161651059 has 2 divisors, whose sum is σ = 161651060. Its totient is φ = 161651058.

The previous prime is 161651057. The next prime is 161651093. The reversal of 161651059 is 950156161.

161651059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (161651093) can be obtained adding 161651059 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161651059 - 2¹ = 161651057 is a prime.

It is a super-2 number, since 2×161651059² = 52262129751642962, which contains 22 as substring.

Together with 161651057, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161651053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80825529 + 80825530.

It is an arithmetic number, because the mean of its divisors is an integer number (80825530).

Almost surely, 2^161651059 is an apocalyptic number.

161651059 is a deficient number, since it is larger than the sum of its proper divisors (1).

161651059 is an equidigital number, since it uses as much as digits as its factorization.

161651059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 161651059 is about 12714.2069748766. The cubic root of 161651059 is about 544.7444965694.

The spelling of 161651059 in words is "one hundred sixty-one million, six hundred fifty-one thousand, fifty-nine".