161552701 has 2 divisors, whose sum is σ = 161552702. Its totient is φ = 161552700.

The previous prime is 161552689. The next prime is 161552731. The reversal of 161552701 is 107255161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132940900 + 28611801 = 11530^2 + 5349^2 .

It is a cyclic number.

It is not a de Polignac number, because 161552701 - 2²³ = 153164093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161552701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161552731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80776350 + 80776351.

It is an arithmetic number, because the mean of its divisors is an integer number (80776351).

Almost surely, 2^161552701 is an apocalyptic number.

It is an amenable number.

161552701 is a deficient number, since it is larger than the sum of its proper divisors (1).

161552701 is an equidigital number, since it uses as much as digits as its factorization.

161552701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 161552701 is about 12710.3383511219. The cubic root of 161552701 is about 544.6339893030.

The spelling of 161552701 in words is "one hundred sixty-one million, five hundred fifty-two thousand, seven hundred one".