55140031 has 2 divisors, whose sum is σ = 55140032. Its totient is φ = 55140030.

The previous prime is 55140023. The next prime is 55140037. The reversal of 55140031 is 13004155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55140031 - 2³ = 55140023 is a prime.

It is a super-2 number, since 2×55140031² = 6080846037361922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55139990 and 55140008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55140037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27570015 + 27570016.

It is an arithmetic number, because the mean of its divisors is an integer number (27570016).

Almost surely, 2^55140031 is an apocalyptic number.

55140031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55140031 is an equidigital number, since it uses as much as digits as its factorization.

55140031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55140031 is about 7425.6333736591. The cubic root of 55140031 is about 380.6177187607.

Adding to 55140031 its reverse (13004155), we get a palindrome (68144186).

The spelling of 55140031 in words is "fifty-five million, one hundred forty thousand, thirty-one".