162201561 has 16 divisors (see below), whose sum is σ = 221572800. Its totient is φ = 105509888.

The previous prime is 162201551. The next prime is 162201563. The reversal of 162201561 is 165102261.

It is a cyclic number.

It is not a de Polignac number, because 162201561 - 2²¹ = 160104409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (162201563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20905 + ... + 27593.

It is an arithmetic number, because the mean of its divisors is an integer number (13848300).

Almost surely, 2^162201561 is an apocalyptic number.

It is an amenable number.

162201561 is a deficient number, since it is larger than the sum of its proper divisors (59371239).

162201561 is a wasteful number, since it uses less digits than its factorization.

162201561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 162201561 is about 12735.8376638523. The cubic root of 162201561 is about 545.3621709656.

The spelling of 162201561 in words is "one hundred sixty-two million, two hundred one thousand, five hundred sixty-one".