55861061 has 2 divisors, whose sum is σ = 55861062. Its totient is φ = 55861060.

The previous prime is 55861033. The next prime is 55861063. The reversal of 55861061 is 16016855.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51984100 + 3876961 = 7210^2 + 1969^2 .

It is a cyclic number.

It is not a de Polignac number, because 55861061 - 2¹⁰ = 55860037 is a prime.

Together with 55861063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55861063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27930530 + 27930531.

It is an arithmetic number, because the mean of its divisors is an integer number (27930531).

Almost surely, 2^55861061 is an apocalyptic number.

It is an amenable number.

55861061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55861061 is an equidigital number, since it uses as much as digits as its factorization.

55861061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 55861061 is about 7474.0257559096. The cubic root of 55861061 is about 382.2695688705.

The spelling of 55861061 in words is "fifty-five million, eight hundred sixty-one thousand, sixty-one".