40311031 has 4 divisors (see below), whose sum is σ = 40878864. Its totient is φ = 39743200.

The previous prime is 40311023. The next prime is 40311043. The reversal of 40311031 is 13011304.

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

It is a cyclic number.

It is not a de Polignac number, because 40311031 - 2³ = 40311023 is a prime.

It is a super-2 number, since 2×40311031² = 3249958440565922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40311071) 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, 283810 + ... + 283951.

It is an arithmetic number, because the mean of its divisors is an integer number (10219716).

Almost surely, 2^40311031 is an apocalyptic number.

40311031 is a deficient number, since it is larger than the sum of its proper divisors (567833).

40311031 is an equidigital number, since it uses as much as digits as its factorization.

40311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567832.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 40311031 is about 6349.0968649092. The cubic root of 40311031 is about 342.8793275410.

Adding to 40311031 its reverse (13011304), we get a palindrome (53322335).

The spelling of 40311031 in words is "forty million, three hundred eleven thousand, thirty-one".