40431311 has 8 divisors (see below), whose sum is σ = 41077920. Its totient is φ = 39789792.

The previous prime is 40431283. The next prime is 40431317. The reversal of 40431311 is 11313404.

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

It is a cyclic number.

It is not a de Polignac number, because 40431311 - 2¹⁰ = 40430287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40431311.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16685 + ... + 18953.

It is an arithmetic number, because the mean of its divisors is an integer number (5134740).

Almost surely, 2^40431311 is an apocalyptic number.

40431311 is a deficient number, since it is larger than the sum of its proper divisors (646609).

40431311 is a wasteful number, since it uses less digits than its factorization.

40431311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40431311 is about 6358.5620229734. The cubic root of 40431311 is about 343.2200165415.

Adding to 40431311 its reverse (11313404), we get a palindrome (51744715).

The spelling of 40431311 in words is "forty million, four hundred thirty-one thousand, three hundred eleven".