55040633 has 4 divisors (see below), whose sum is σ = 57433728. Its totient is φ = 52647540.

The previous prime is 55040621. The next prime is 55040639. The reversal of 55040633 is 33604055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33604055 = 5 ⋅6720811.

It is a cyclic number.

It is not a de Polignac number, because 55040633 - 2²⁴ = 38263417 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 (55040639) 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, 1196513 + ... + 1196558.

It is an arithmetic number, because the mean of its divisors is an integer number (14358432).

Almost surely, 2^55040633 is an apocalyptic number.

It is an amenable number.

55040633 is a deficient number, since it is larger than the sum of its proper divisors (2393095).

55040633 is a wasteful number, since it uses less digits than its factorization.

55040633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393094.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 55040633 is about 7418.9374576148. The cubic root of 55040633 is about 380.3888747606.

Adding to 55040633 its reverse (33604055), we get a palindrome (88644688).

The spelling of 55040633 in words is "fifty-five million, forty thousand, six hundred thirty-three".