55062781 has 4 divisors (see below), whose sum is σ = 55726272. Its totient is φ = 54399292.

The previous prime is 55062769. The next prime is 55062823. The reversal of 55062781 is 18726055.

55062781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18726055 = 5 ⋅3745211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55062781 is a prime.

It is a super-2 number, since 2×55062781² = 6063819702907922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55062751) 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 in 3 ways as a sum of consecutive naturals, for example, 331621 + ... + 331786.

It is an arithmetic number, because the mean of its divisors is an integer number (13931568).

Almost surely, 2^55062781 is an apocalyptic number.

It is an amenable number.

55062781 is a deficient number, since it is larger than the sum of its proper divisors (663491).

55062781 is an equidigital number, since it uses as much as digits as its factorization.

55062781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663490.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 55062781 is about 7420.4299740648. The cubic root of 55062781 is about 380.4398899383.

The spelling of 55062781 in words is "fifty-five million, sixty-two thousand, seven hundred eighty-one".