40823381531 has 4 divisors (see below), whose sum is σ = 40826125872. Its totient is φ = 40820637192.

The previous prime is 40823381527. The next prime is 40823381537. The reversal of 40823381531 is 13518332804.

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 40823381531 - 2² = 40823381527 is a prime.

It is a super-2 number, since 2×40823381531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40823381537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349735 + ... + 1379648.

It is an arithmetic number, because the mean of its divisors is an integer number (10206531468).

Almost surely, 2^40823381531 is an apocalyptic number.

40823381531 is a deficient number, since it is larger than the sum of its proper divisors (2744341).

40823381531 is a wasteful number, since it uses less digits than its factorization.

40823381531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744340.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 40823381531 in words is "forty billion, eight hundred twenty-three million, three hundred eighty-one thousand, five hundred thirty-one".