40213503 has 40 divisors (see below), whose sum is σ = 66251856. Its totient is φ = 24306480.

The previous prime is 40213469. The next prime is 40213513. The reversal of 40213503 is 30531204.

It is not a de Polignac number, because 40213503 - 2²⁰ = 39164927 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213513) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 107625 + ... + 107997.

Almost surely, 2^40213503 is an apocalyptic number.

40213503 is a deficient number, since it is larger than the sum of its proper divisors (26038353).

40213503 is an equidigital number, since it uses as much as digits as its factorization.

40213503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 40213503 is about 6341.4117513374. The cubic root of 40213503 is about 342.6025849315.

Adding to 40213503 its reverse (30531204), we get a palindrome (70744707).

The spelling of 40213503 in words is "forty million, two hundred thirteen thousand, five hundred three".