40133213 has 4 divisors (see below), whose sum is σ = 40164960. Its totient is φ = 40101468.

The previous prime is 40133167. The next prime is 40133227. The reversal of 40133213 is 31233104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40133213 - 2⁸ = 40132957 is a prime.

It is a super-2 number, since 2×40133213² = 3221349571406738, 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 = 40133191 and 40133200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40133813) 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, 13895 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (10041240).

Almost surely, 2^40133213 is an apocalyptic number.

It is an amenable number.

40133213 is a deficient number, since it is larger than the sum of its proper divisors (31747).

40133213 is a wasteful number, since it uses less digits than its factorization.

40133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31746.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 40133213 is about 6335.0779789992. The cubic root of 40133213 is about 342.3744203685.

Adding to 40133213 its reverse (31233104), we get a palindrome (71366317).

The spelling of 40133213 in words is "forty million, one hundred thirty-three thousand, two hundred thirteen".