162157201 has 8 divisors (see below), whose sum is σ = 163442664. Its totient is φ = 160876800.

The previous prime is 162157189. The next prime is 162157207. The reversal of 162157201 is 102751261.

It can be written as a sum of positive squares in 4 ways, for example, as 9610000 + 152547201 = 3100^2 + 12351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 162157201 - 2⁹ = 162156689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162157207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84351 + ... + 86251.

It is an arithmetic number, because the mean of its divisors is an integer number (20430333).

Almost surely, 2^162157201 is an apocalyptic number.

It is an amenable number.

162157201 is a deficient number, since it is larger than the sum of its proper divisors (1285463).

162157201 is a wasteful number, since it uses less digits than its factorization.

162157201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 162157201 is about 12734.0960024652. The cubic root of 162157201 is about 545.3124499651.

The spelling of 162157201 in words is "one hundred sixty-two million, one hundred fifty-seven thousand, two hundred one".