40431315 has 16 divisors (see below), whose sum is σ = 65911968. Its totient is φ = 21156096.

The previous prime is 40431283. The next prime is 40431317. The reversal of 40431315 is 51313404.

It is not a de Polignac number, because 40431315 - 2⁵ = 40431283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40431291 and 40431300.

It is not an unprimeable number, because it can be changed into a prime (40431317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24634 + ... + 26223.

It is an arithmetic number, because the mean of its divisors is an integer number (4119498).

Almost surely, 2^40431315 is an apocalyptic number.

40431315 is a deficient number, since it is larger than the sum of its proper divisors (25480653).

40431315 is a wasteful number, since it uses less digits than its factorization.

40431315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50918.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40431315 is about 6358.5623375100. The cubic root of 40431315 is about 343.2200278601.

Adding to 40431315 its reverse (51313404), we get a palindrome (91744719).

The spelling of 40431315 in words is "forty million, four hundred thirty-one thousand, three hundred fifteen".