55731019 has 2 divisors, whose sum is σ = 55731020. Its totient is φ = 55731018.

The previous prime is 55731007. The next prime is 55731041. The reversal of 55731019 is 91013755.

55731019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55731019 - 2¹³ = 55722827 is a prime.

It is a super-2 number, since 2×55731019² = 6211892957556722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55731079) 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 as a sum of consecutive naturals, namely, 27865509 + 27865510.

It is an arithmetic number, because the mean of its divisors is an integer number (27865510).

Almost surely, 2^55731019 is an apocalyptic number.

55731019 is a deficient number, since it is larger than the sum of its proper divisors (1).

55731019 is an equidigital number, since it uses as much as digits as its factorization.

55731019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 55731019 is about 7465.3210915539. The cubic root of 55731019 is about 381.9727030192.

The spelling of 55731019 in words is "fifty-five million, seven hundred thirty-one thousand, nineteen".