55331663 has 2 divisors, whose sum is σ = 55331664. Its totient is φ = 55331662.

The previous prime is 55331657. The next prime is 55331671. The reversal of 55331663 is 36613355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55331663 - 2⁶ = 55331599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55331963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665831 + 27665832.

It is an arithmetic number, because the mean of its divisors is an integer number (27665832).

Almost surely, 2^55331663 is an apocalyptic number.

55331663 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331663 is an equidigital number, since it uses as much as digits as its factorization.

55331663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 32.

The square root of 55331663 is about 7438.5255931535. The cubic root of 55331663 is about 381.0581380592.

The spelling of 55331663 in words is "fifty-five million, three hundred thirty-one thousand, six hundred sixty-three".