40019553 has 24 divisors (see below), whose sum is σ = 66233856. Its totient is φ = 22809600.

The previous prime is 40019537. The next prime is 40019557. The reversal of 40019553 is 35591004.

It is not a de Polignac number, because 40019553 - 2⁴ = 40019537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40019557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39888 + ... + 40878.

It is an arithmetic number, because the mean of its divisors is an integer number (2759744).

Almost surely, 2^40019553 is an apocalyptic number.

It is an amenable number.

40019553 is a deficient number, since it is larger than the sum of its proper divisors (26214303).

40019553 is a wasteful number, since it uses less digits than its factorization.

40019553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 40019553 is about 6326.1009318537. The cubic root of 40019553 is about 342.0509055240.

The spelling of 40019553 in words is "forty million, nineteen thousand, five hundred fifty-three".