55481719 has 2 divisors, whose sum is σ = 55481720. Its totient is φ = 55481718.

The previous prime is 55481717. The next prime is 55481737. The reversal of 55481719 is 91718455.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55481719 - 2¹ = 55481717 is a prime.

It is a super-2 number, since 2×55481719² = 6156442286389922, which contains 22 as substring.

Together with 55481717, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55481717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27740859 + 27740860.

It is an arithmetic number, because the mean of its divisors is an integer number (27740860).

Almost surely, 2^55481719 is an apocalyptic number.

55481719 is a deficient number, since it is larger than the sum of its proper divisors (1).

55481719 is an equidigital number, since it uses as much as digits as its factorization.

55481719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 55481719 is about 7448.6051714398. The cubic root of 55481719 is about 381.4022957260.

The spelling of 55481719 in words is "fifty-five million, four hundred eighty-one thousand, seven hundred nineteen".