40281631 has 8 divisors (see below), whose sum is σ = 43538544. Its totient is φ = 37047360.

The previous prime is 40281629. The next prime is 40281649. The reversal of 40281631 is 13618204.

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

It is a cyclic number.

It is not a de Polignac number, because 40281631 - 2¹ = 40281629 is a prime.

It is a super-2 number, since 2×40281631² = 3245219592040322, 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 = 40281596 and 40281605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40288631) 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, 1861 + ... + 9166.

It is an arithmetic number, because the mean of its divisors is an integer number (5442318).

Almost surely, 2^40281631 is an apocalyptic number.

40281631 is a deficient number, since it is larger than the sum of its proper divisors (3256913).

40281631 is a wasteful number, since it uses less digits than its factorization.

40281631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 40281631 is about 6346.7811526789. The cubic root of 40281631 is about 342.7959500000.

Adding to 40281631 its reverse (13618204), we get a palindrome (53899835).

The spelling of 40281631 in words is "forty million, two hundred eighty-one thousand, six hundred thirty-one".