55400563 has 2 divisors, whose sum is σ = 55400564. Its totient is φ = 55400562.

The previous prime is 55400557. The next prime is 55400573. The reversal of 55400563 is 36500455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55400563 - 2¹³ = 55392371 is a prime.

It is equal to p_3304693 and since 55400563 and 3304693 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55400533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700281 + 27700282.

It is an arithmetic number, because the mean of its divisors is an integer number (27700282).

Almost surely, 2^55400563 is an apocalyptic number.

55400563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400563 is an equidigital number, since it uses as much as digits as its factorization.

55400563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 55400563 is about 7443.1554464488. The cubic root of 55400563 is about 381.2162393109.

The spelling of 55400563 in words is "fifty-five million, four hundred thousand, five hundred sixty-three".