40131123533 has 4 divisors (see below), whose sum is σ = 40424051580. Its totient is φ = 39838195488.

The previous prime is 40131123523. The next prime is 40131123551. The reversal of 40131123533 is 33532113104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21024420004 + 19106703529 = 144998^2 + 138227^2 .

It is a cyclic number.

It is not a de Polignac number, because 40131123533 - 2⁴ = 40131123517 is a prime.

It is a super-2 number, since 2×40131123533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131123523) 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, 146463818 + ... + 146464091.

It is an arithmetic number, because the mean of its divisors is an integer number (10106012895).

Almost surely, 2^40131123533 is an apocalyptic number.

It is an amenable number.

40131123533 is a deficient number, since it is larger than the sum of its proper divisors (292928047).

40131123533 is a wasteful number, since it uses less digits than its factorization.

40131123533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292928046.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 40131123533 its reverse (33532113104), we get a palindrome (73663236637).

The spelling of 40131123533 in words is "forty billion, one hundred thirty-one million, one hundred twenty-three thousand, five hundred thirty-three".