55005961 has 2 divisors, whose sum is σ = 55005962. Its totient is φ = 55005960.

The previous prime is 55005947. The next prime is 55005971. The reversal of 55005961 is 16950055.

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., 43309561 + 11696400 = 6581^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 55005961 - 2⁷ = 55005833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55005971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502980 + 27502981.

It is an arithmetic number, because the mean of its divisors is an integer number (27502981).

Almost surely, 2^55005961 is an apocalyptic number.

It is an amenable number.

55005961 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005961 is an equidigital number, since it uses as much as digits as its factorization.

55005961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 55005961 is about 7416.6003667449. The cubic root of 55005961 is about 380.3089846099.

The spelling of 55005961 in words is "fifty-five million, five thousand, nine hundred sixty-one".