55605031 has 2 divisors, whose sum is σ = 55605032. Its totient is φ = 55605030.

The previous prime is 55605013. The next prime is 55605073. The reversal of 55605031 is 13050655.

Together with previous prime (55605013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55605031 - 2⁹ = 55604519 is a prime.

It is a super-2 number, since 2×55605031² = 6183838945021922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55604987 and 55605005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55605131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27802515 + 27802516.

It is an arithmetic number, because the mean of its divisors is an integer number (27802516).

Almost surely, 2^55605031 is an apocalyptic number.

55605031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55605031 is an equidigital number, since it uses as much as digits as its factorization.

55605031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 55605031 is about 7456.8781001167. The cubic root of 55605031 is about 381.6846510682.

Adding to 55605031 its reverse (13050655), we get a palindrome (68655686).

The spelling of 55605031 in words is "fifty-five million, six hundred five thousand, thirty-one".