40213523 has 8 divisors (see below), whose sum is σ = 46024800. Its totient is φ = 34418880.

The previous prime is 40213513. The next prime is 40213531. The reversal of 40213523 is 32531204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40213523 - 2¹⁴ = 40197139 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 40213495 and 40213504.

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 7 ways as a sum of consecutive naturals, for example, 1553 + ... + 9101.

It is an arithmetic number, because the mean of its divisors is an integer number (5753100).

Almost surely, 2^40213523 is an apocalyptic number.

40213523 is a deficient number, since it is larger than the sum of its proper divisors (5811277).

40213523 is an equidigital number, since it uses as much as digits as its factorization.

40213523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40213523 is about 6341.4133282731. The cubic root of 40213523 is about 342.6026417287.

Adding to 40213523 its reverse (32531204), we get a palindrome (72744727).

The spelling of 40213523 in words is "forty million, two hundred thirteen thousand, five hundred twenty-three".