40161801 has 8 divisors (see below), whose sum is σ = 56367520. Its totient is φ = 25365312.

The previous prime is 40161767. The next prime is 40161809. The reversal of 40161801 is 10816104.

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

It is not a de Polignac number, because 40161801 - 2¹⁹ = 39637513 is a prime.

It is a super-2 number, since 2×40161801² = 3225940519127202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40161809) 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, 352240 + ... + 352353.

It is an arithmetic number, because the mean of its divisors is an integer number (7045940).

Almost surely, 2^40161801 is an apocalyptic number.

It is an amenable number.

40161801 is a deficient number, since it is larger than the sum of its proper divisors (16205719).

40161801 is a wasteful number, since it uses less digits than its factorization.

40161801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704615.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 40161801 is about 6337.3339031489. Note that the first 3 decimals coincide. The cubic root of 40161801 is about 342.4556953365.

Adding to 40161801 its reverse (10816104), we get a palindrome (50977905).

The spelling of 40161801 in words is "forty million, one hundred sixty-one thousand, eight hundred one".