55782071 has 2 divisors, whose sum is σ = 55782072. Its totient is φ = 55782070.

The previous prime is 55782053. The next prime is 55782127. The reversal of 55782071 is 17028755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55782071 - 2⁶ = 55782007 is a prime.

It is a super-2 number, since 2×55782071² = 6223278890098082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55782011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27891035 + 27891036.

It is an arithmetic number, because the mean of its divisors is an integer number (27891036).

Almost surely, 2^55782071 is an apocalyptic number.

55782071 is a deficient number, since it is larger than the sum of its proper divisors (1).

55782071 is an equidigital number, since it uses as much as digits as its factorization.

55782071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 55782071 is about 7468.7395857668. The cubic root of 55782071 is about 382.0893018744.

It can be divided in two parts, 557 and 82071, that added together give a palindrome (82628).

The spelling of 55782071 in words is "fifty-five million, seven hundred eighty-two thousand, seventy-one".