40030631 has 4 divisors (see below), whose sum is σ = 42385392. Its totient is φ = 37675872.

The previous prime is 40030609. The next prime is 40030667. The reversal of 40030631 is 13603004.

40030631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40030631 - 2¹⁰ = 40029607 is a prime.

It is a super-2 number, since 2×40030631² = 3204902836516322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 2354743 = 40030631 / (4 + 0 + 0 + 3 + 0 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40030231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177355 + ... + 1177388.

It is an arithmetic number, because the mean of its divisors is an integer number (10596348).

Almost surely, 2^40030631 is an apocalyptic number.

40030631 is a deficient number, since it is larger than the sum of its proper divisors (2354761).

40030631 is a wasteful number, since it uses less digits than its factorization.

40030631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354760.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 40030631 is about 6326.9764500905. The cubic root of 40030631 is about 342.0824641835.

Adding to 40030631 its reverse (13603004), we get a palindrome (53633635).

The spelling of 40030631 in words is "forty million, thirty thousand, six hundred thirty-one".