161351005 has 16 divisors (see below), whose sum is σ = 196130160. Its totient is φ = 127418368.

The previous prime is 161350999. The next prime is 161351009. The reversal of 161351005 is 500153161.

161351005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 8259876 + 153091129 = 2874^2 + 12373^2 .

It is a cyclic number.

It is not a de Polignac number, because 161351005 - 2⁹ = 161350493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161351009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199041 + ... + 199849.

It is an arithmetic number, because the mean of its divisors is an integer number (12258135).

Almost surely, 2^161351005 is an apocalyptic number.

It is an amenable number.

161351005 is a deficient number, since it is larger than the sum of its proper divisors (34779155).

161351005 is a wasteful number, since it uses less digits than its factorization.

161351005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 161351005 is about 12702.4015445899. The cubic root of 161351005 is about 544.4072392627.

The spelling of 161351005 in words is "one hundred sixty-one million, three hundred fifty-one thousand, five".