40531144531 has 4 divisors (see below), whose sum is σ = 40533182200. Its totient is φ = 40529106864.

The previous prime is 40531144523. The next prime is 40531144579. The reversal of 40531144531 is 13544113504.

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 40531144531 - 2³ = 40531144523 is a prime.

It is a super-2 number, since 2×40531144531² (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 = 40531144493 and 40531144502.

It is not an unprimeable number, because it can be changed into a prime (40531144231) 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, 988701 + ... + 1028878.

It is an arithmetic number, because the mean of its divisors is an integer number (10133295550).

Almost surely, 2^40531144531 is an apocalyptic number.

40531144531 is a deficient number, since it is larger than the sum of its proper divisors (2037669).

40531144531 is a wasteful number, since it uses less digits than its factorization.

40531144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037668.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 40531144531 in words is "forty billion, five hundred thirty-one million, one hundred forty-four thousand, five hundred thirty-one".