55633771 has 2 divisors, whose sum is σ = 55633772. Its totient is φ = 55633770.

The previous prime is 55633751. The next prime is 55633783. The reversal of 55633771 is 17733655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55633771 - 2¹⁵ = 55601003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55633771.

It is not a weakly prime, because it can be changed into another prime (55633751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27816885 + 27816886.

It is an arithmetic number, because the mean of its divisors is an integer number (27816886).

Almost surely, 2^55633771 is an apocalyptic number.

55633771 is a deficient number, since it is larger than the sum of its proper divisors (1).

55633771 is an equidigital number, since it uses as much as digits as its factorization.

55633771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 37.

The square root of 55633771 is about 7458.8049310865. The cubic root of 55633771 is about 381.7503988810.

The spelling of 55633771 in words is "fifty-five million, six hundred thirty-three thousand, seven hundred seventy-one".