40401131131 has 4 divisors (see below), whose sum is σ = 41493053632. Its totient is φ = 39309208632.

The previous prime is 40401131123. The next prime is 40401131167. The reversal of 40401131131 is 13113110404.

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 40401131131 - 2³ = 40401131123 is a prime.

It is a super-2 number, since 2×40401131131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40401131099 and 40401131108.

It is not an unprimeable number, because it can be changed into a prime (40401131101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545961195 + ... + 545961268.

It is an arithmetic number, because the mean of its divisors is an integer number (10373263408).

Almost surely, 2^40401131131 is an apocalyptic number.

40401131131 is a deficient number, since it is larger than the sum of its proper divisors (1091922501).

40401131131 is a wasteful number, since it uses less digits than its factorization.

40401131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091922500.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 40401131131 its reverse (13113110404), we get a palindrome (53514241535).

The spelling of 40401131131 in words is "forty billion, four hundred one million, one hundred thirty-one thousand, one hundred thirty-one".