1567172161 has 2 divisors, whose sum is σ = 1567172162. Its totient is φ = 1567172160.

The previous prime is 1567172153. The next prime is 1567172177. The reversal of 1567172161 is 1612717651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1560250000 + 6922161 = 39500^2 + 2631^2 .

It is an emirp because it is prime and its reverse (1612717651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1567172161 - 2³ = 1567172153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1567172161.

It is not a weakly prime, because it can be changed into another prime (1567172261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783586080 + 783586081.

It is an arithmetic number, because the mean of its divisors is an integer number (783586081).

Almost surely, 2^1567172161 is an apocalyptic number.

It is an amenable number.

1567172161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1567172161 is an equidigital number, since it uses as much as digits as its factorization.

1567172161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 37.

The square root of 1567172161 is about 39587.5253204845. The cubic root of 1567172161 is about 1161.5526575166.

The spelling of 1567172161 in words is "one billion, five hundred sixty-seven million, one hundred seventy-two thousand, one hundred sixty-one".