40151631 has 32 divisors (see below), whose sum is σ = 60318720. Its totient is φ = 23587200.

The previous prime is 40151621. The next prime is 40151659. The reversal of 40151631 is 13615104.

40151631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40151631 - 2⁹ = 40151119 is a prime.

It is a super-2 number, since 2×40151631² = 3224306943920322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40151598 and 40151607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40151611) 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 31 ways as a sum of consecutive naturals, for example, 148026 + ... + 148296.

It is an arithmetic number, because the mean of its divisors is an integer number (1884960).

Almost surely, 2^40151631 is an apocalyptic number.

40151631 is a deficient number, since it is larger than the sum of its proper divisors (20167089).

40151631 is a wasteful number, since it uses less digits than its factorization.

40151631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40151631 is about 6336.5314644528. The cubic root of 40151631 is about 342.4267867023.

Adding to 40151631 its reverse (13615104), we get a palindrome (53766735).

The spelling of 40151631 in words is "forty million, one hundred fifty-one thousand, six hundred thirty-one".