40144172431 has 4 divisors (see below), whose sum is σ = 43793642664. Its totient is φ = 36494702200.

The previous prime is 40144172429. The next prime is 40144172443. The reversal of 40144172431 is 13427144104.

It is a happy number.

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

It is not a de Polignac number, because 40144172431 - 2¹ = 40144172429 is a prime.

It is a super-2 number, since 2×40144172431² (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 = 40144172393 and 40144172402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144172231) 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, 1824735100 + ... + 1824735121.

It is an arithmetic number, because the mean of its divisors is an integer number (10948410666).

Almost surely, 2^40144172431 is an apocalyptic number.

40144172431 is a deficient number, since it is larger than the sum of its proper divisors (3649470233).

40144172431 is a wasteful number, since it uses less digits than its factorization.

40144172431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649470232.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 40144172431 in words is "forty billion, one hundred forty-four million, one hundred seventy-two thousand, four hundred thirty-one".