40202161 has 4 divisors (see below), whose sum is σ = 42567012. Its totient is φ = 37837312.

The previous prime is 40202159. The next prime is 40202167. The reversal of 40202161 is 16120204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30869136 + 9333025 = 5556^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 40202161 - 2¹ = 40202159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40202167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182400 + ... + 1182433.

It is an arithmetic number, because the mean of its divisors is an integer number (10641753).

Almost surely, 2^40202161 is an apocalyptic number.

It is an amenable number.

40202161 is a deficient number, since it is larger than the sum of its proper divisors (2364851).

40202161 is a wasteful number, since it uses less digits than its factorization.

40202161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364850.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 40202161 is about 6340.5174079092. The cubic root of 40202161 is about 342.5703721703.

Adding to 40202161 its reverse (16120204), we get a palindrome (56322365).

The spelling of 40202161 in words is "forty million, two hundred two thousand, one hundred sixty-one".