55786531 has 2 divisors, whose sum is σ = 55786532. Its totient is φ = 55786530.

The previous prime is 55786529. The next prime is 55786567. The reversal of 55786531 is 13568755.

55786531 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 55786531 - 2¹ = 55786529 is a prime.

It is a super-2 number, since 2×55786531² = 6224274082027922, which contains 22 as substring.

Together with 55786529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55780531) 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, 27893265 + 27893266.

It is an arithmetic number, because the mean of its divisors is an integer number (27893266).

Almost surely, 2^55786531 is an apocalyptic number.

55786531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55786531 is an equidigital number, since it uses as much as digits as its factorization.

55786531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 55786531 is about 7469.0381576211. The cubic root of 55786531 is about 382.0994847930.

The spelling of 55786531 in words is "fifty-five million, seven hundred eighty-six thousand, five hundred thirty-one".