55040433 has 16 divisors (see below), whose sum is σ = 85125120. Its totient is φ = 30981456.

The previous prime is 55040429. The next prime is 55040459. The reversal of 55040433 is 33404055.

It is a happy number.

It is not a de Polignac number, because 55040433 - 2² = 55040429 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55040233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18153 + ... + 20966.

It is an arithmetic number, because the mean of its divisors is an integer number (5320320).

Almost surely, 2^55040433 is an apocalyptic number.

It is an amenable number.

55040433 is a deficient number, since it is larger than the sum of its proper divisors (30084687).

55040433 is a wasteful number, since it uses less digits than its factorization.

55040433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39196.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 55040433 is about 7418.9239785834. The cubic root of 55040433 is about 380.3884140230.

Adding to 55040433 its reverse (33404055), we get a palindrome (88444488).

The spelling of 55040433 in words is "fifty-five million, forty thousand, four hundred thirty-three".