55651601 has 2 divisors, whose sum is σ = 55651602. Its totient is φ = 55651600.

The previous prime is 55651571. The next prime is 55651613. The reversal of 55651601 is 10615655.

It is a Cunningham number, because it is equal to 7460²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55651600 + 1 = 7460^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 55651601 - 2¹⁰ = 55650577 is a prime.

It is not a weakly prime, because it can be changed into another prime (55651301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27825800 + 27825801.

It is an arithmetic number, because the mean of its divisors is an integer number (27825801).

Almost surely, 2^55651601 is an apocalyptic number.

It is an amenable number.

55651601 is a deficient number, since it is larger than the sum of its proper divisors (1).

55651601 is an equidigital number, since it uses as much as digits as its factorization.

55651601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55651601 is about 7460.0000670241. Note that the first 4 decimals coincide. The cubic root of 55651601 is about 381.7911767663.

The spelling of 55651601 in words is "fifty-five million, six hundred fifty-one thousand, six hundred one".