55233731 has 24 divisors (see below), whose sum is σ = 69209856. Its totient is φ = 43787520.

The previous prime is 55233727. The next prime is 55233733. The reversal of 55233731 is 13733255.

55233731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55233731 - 2² = 55233727 is a prime.

It is a super-2 number, since 2×55233731² = 6101530080360722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55233694 and 55233703.

It is not an unprimeable number, because it can be changed into a prime (55233733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50270 + ... + 51356.

It is an arithmetic number, because the mean of its divisors is an integer number (2883744).

Almost surely, 2^55233731 is an apocalyptic number.

55233731 is a deficient number, since it is larger than the sum of its proper divisors (13976125).

55233731 is a wasteful number, since it uses less digits than its factorization.

55233731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1172 counting only the distinct ones).

The product of its digits is 9450, while the sum is 29.

The square root of 55233731 is about 7431.9399217163. The cubic root of 55233731 is about 380.8331925724.

Adding to 55233731 its reverse (13733255), we get a palindrome (68966986).

The spelling of 55233731 in words is "fifty-five million, two hundred thirty-three thousand, seven hundred thirty-one".