40002553 has 4 divisors (see below), whose sum is σ = 40308048. Its totient is φ = 39697060.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002553 is 35520004.

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 40002553 - 2⁹ = 40002041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40002553.

It is not an unprimeable number, because it can be changed into a prime (40002559) 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, 152551 + ... + 152812.

It is an arithmetic number, because the mean of its divisors is an integer number (10077012).

Almost surely, 2^40002553 is an apocalyptic number.

It is an amenable number.

40002553 is a deficient number, since it is larger than the sum of its proper divisors (305495).

40002553 is a wasteful number, since it uses less digits than its factorization.

40002553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305494.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 40002553 is about 6324.7571494880. The cubic root of 40002553 is about 342.0024651282.

Adding to 40002553 its reverse (35520004), we get a palindrome (75522557).

The spelling of 40002553 in words is "forty million, two thousand, five hundred fifty-three".