40431305 has 8 divisors (see below), whose sum is σ = 49201344. Its totient is φ = 31889200.

The previous prime is 40431283. The next prime is 40431317. The reversal of 40431305 is 50313404.

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

It is not a de Polignac number, because 40431305 - 2⁶ = 40431241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56591 + ... + 57300.

It is an arithmetic number, because the mean of its divisors is an integer number (6150168).

Almost surely, 2^40431305 is an apocalyptic number.

It is an amenable number.

40431305 is a deficient number, since it is larger than the sum of its proper divisors (8770039).

40431305 is a wasteful number, since it uses less digits than its factorization.

40431305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113967.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40431305 is about 6358.5615511686. The cubic root of 40431305 is about 343.2199995635.

Adding to 40431305 its reverse (50313404), we get a palindrome (90744709).

The spelling of 40431305 in words is "forty million, four hundred thirty-one thousand, three hundred five".