40173431 has 8 divisors (see below), whose sum is σ = 42593040. Its totient is φ = 37760128.

The previous prime is 40173409. The next prime is 40173437. The reversal of 40173431 is 13437104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-40173431 is a prime.

It is a super-2 number, since 2×40173431² = 3227809116623522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40173397 and 40173406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40173437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20465 + ... + 22341.

It is an arithmetic number, because the mean of its divisors is an integer number (5324130).

Almost surely, 2^40173431 is an apocalyptic number.

40173431 is a deficient number, since it is larger than the sum of its proper divisors (2419609).

40173431 is a wasteful number, since it uses less digits than its factorization.

40173431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40173431 is about 6338.2514150198. The cubic root of 40173431 is about 342.4887480986.

It can be divided in two parts, 40173 and 431, that added together give a palindrome (40604).

The spelling of 40173431 in words is "forty million, one hundred seventy-three thousand, four hundred thirty-one".