40200031 has 4 divisors (see below), whose sum is σ = 40236952. Its totient is φ = 40163112.

The previous prime is 40199983. The next prime is 40200071. The reversal of 40200031 is 13000204.

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

It is a cyclic number.

It is not a de Polignac number, because 40200031 - 2⁹ = 40199519 is a prime.

It is a super-2 number, since 2×40200031² = 3232084984801922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40199990 and 40200017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40200071) 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, 16776 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (10059238).

Almost surely, 2^40200031 is an apocalyptic number.

40200031 is a deficient number, since it is larger than the sum of its proper divisors (36921).

40200031 is a wasteful number, since it uses less digits than its factorization.

40200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36920.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40200031 is about 6340.3494383196. The cubic root of 40200031 is about 342.5643220165.

Adding to 40200031 its reverse (13000204), we get a palindrome (53200235).

The spelling of 40200031 in words is "forty million, two hundred thousand, thirty-one".