40204553 has 4 divisors (see below), whose sum is σ = 40286928. Its totient is φ = 40122180.

The previous prime is 40204543. The next prime is 40204561. The reversal of 40204553 is 35540204.

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 40204553 - 2¹⁰ = 40203529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40204543) 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, 40451 + ... + 41432.

It is an arithmetic number, because the mean of its divisors is an integer number (10071732).

Almost surely, 2^40204553 is an apocalyptic number.

It is an amenable number.

40204553 is a deficient number, since it is larger than the sum of its proper divisors (82375).

40204553 is an equidigital number, since it uses as much as digits as its factorization.

40204553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82374.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 40204553 is about 6340.7060332427. The cubic root of 40204553 is about 342.5771662668.

Adding to 40204553 its reverse (35540204), we get a palindrome (75744757).

The spelling of 40204553 in words is "forty million, two hundred four thousand, five hundred fifty-three".