55986481 has 2 divisors, whose sum is σ = 55986482. Its totient is φ = 55986480.

The previous prime is 55986479. The next prime is 55986499. The reversal of 55986481 is 18468955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 12215025 = 6616^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 55986481 - 2¹ = 55986479 is a prime.

It is a super-2 number, since 2×55986481² = 6268972109526722, which contains 22 as substring.

Together with 55986479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55986451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27993240 + 27993241.

It is an arithmetic number, because the mean of its divisors is an integer number (27993241).

Almost surely, 2^55986481 is an apocalyptic number.

It is an amenable number.

55986481 is a deficient number, since it is larger than the sum of its proper divisors (1).

55986481 is an equidigital number, since it uses as much as digits as its factorization.

55986481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The square root of 55986481 is about 7482.4114428438. The cubic root of 55986481 is about 382.5554472712. Note that the first 3 decimals are identical.

The spelling of 55986481 in words is "fifty-five million, nine hundred eighty-six thousand, four hundred eighty-one".