40503031 has 4 divisors (see below), whose sum is σ = 40881672. Its totient is φ = 40124392.

The previous prime is 40503013. The next prime is 40503037. The reversal of 40503031 is 13030504.

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 40503031 - 2⁹ = 40502519 is a prime.

It is a super-2 number, since 2×40503031² = 3280991040373922, 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 = 40502996 and 40503014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40503037) 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, 189160 + ... + 189373.

It is an arithmetic number, because the mean of its divisors is an integer number (10220418).

Almost surely, 2^40503031 is an apocalyptic number.

40503031 is a deficient number, since it is larger than the sum of its proper divisors (378641).

40503031 is a wasteful number, since it uses less digits than its factorization.

40503031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378640.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 40503031 is about 6364.1991640740. The cubic root of 40503031 is about 343.4228395372.

Adding to 40503031 its reverse (13030504), we get a palindrome (53533535).

The spelling of 40503031 in words is "forty million, five hundred three thousand, thirty-one".