40451213 has 4 divisors (see below), whose sum is σ = 44128608. Its totient is φ = 36773820.

The previous prime is 40451189. The next prime is 40451219. The reversal of 40451213 is 31215404.

40451213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40451213 - 2¹² = 40447117 is a prime.

It is a super-3 number, since 3×40451213³ (a number of 24 digits) contains 333 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 (40451219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838681 + ... + 1838702.

It is an arithmetic number, because the mean of its divisors is an integer number (11032152).

Almost surely, 2^40451213 is an apocalyptic number.

It is an amenable number.

40451213 is a deficient number, since it is larger than the sum of its proper divisors (3677395).

40451213 is a wasteful number, since it uses less digits than its factorization.

40451213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677394.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40451213 is about 6360.1268069120. The cubic root of 40451213 is about 343.2763231028.

Adding to 40451213 its reverse (31215404), we get a palindrome (71666617).

The spelling of 40451213 in words is "forty million, four hundred fifty-one thousand, two hundred thirteen".