55807133 has 4 divisors (see below), whose sum is σ = 55824288. Its totient is φ = 55789980.

The previous prime is 55807127. The next prime is 55807139. The reversal of 55807133 is 33170855.

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: 33170855 = 5 ⋅6634171.

It is an interprime number because it is at equal distance from previous prime (55807127) and next prime (55807139).

It is a cyclic number.

It is not a de Polignac number, because 55807133 - 2⁶ = 55807069 is a prime.

It is a super-2 number, since 2×55807133² = 6228872187359378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55807133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55807139) 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, 2033 + ... + 10758.

It is an arithmetic number, because the mean of its divisors is an integer number (13956072).

Almost surely, 2^55807133 is an apocalyptic number.

It is an amenable number.

55807133 is a deficient number, since it is larger than the sum of its proper divisors (17155).

55807133 is a wasteful number, since it uses less digits than its factorization.

55807133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 55807133 is about 7470.4171904921. The cubic root of 55807133 is about 382.1465155284.

Adding to 55807133 its reverse (33170855), we get a palindrome (88977988).

The spelling of 55807133 in words is "fifty-five million, eight hundred seven thousand, one hundred thirty-three".