40355213 has 4 divisors (see below), whose sum is σ = 40387488. Its totient is φ = 40322940.

The previous prime is 40355177. The next prime is 40355261. The reversal of 40355213 is 31255304.

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 40355213 - 2¹⁰ = 40354189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40355713) 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, 14183 + ... + 16788.

It is an arithmetic number, because the mean of its divisors is an integer number (10096872).

Almost surely, 2^40355213 is an apocalyptic number.

It is an amenable number.

40355213 is a deficient number, since it is larger than the sum of its proper divisors (32275).

40355213 is a wasteful number, since it uses less digits than its factorization.

40355213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 40355213 is about 6352.5753045517. The cubic root of 40355213 is about 343.0045501979.

Subtracting from 40355213 its reverse (31255304), we obtain a palindrome (9099909).

The spelling of 40355213 in words is "forty million, three hundred fifty-five thousand, two hundred thirteen".