55442641 has 2 divisors, whose sum is σ = 55442642. Its totient is φ = 55442640.

The previous prime is 55442623. The next prime is 55442669. The reversal of 55442641 is 14624455.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42302016 + 13140625 = 6504^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 55442641 - 2⁹ = 55442129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55442041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27721320 + 27721321.

It is an arithmetic number, because the mean of its divisors is an integer number (27721321).

Almost surely, 2^55442641 is an apocalyptic number.

It is an amenable number.

55442641 is a deficient number, since it is larger than the sum of its proper divisors (1).

55442641 is an equidigital number, since it uses as much as digits as its factorization.

55442641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 31.

The square root of 55442641 is about 7445.9815336865. The cubic root of 55442641 is about 381.3127290494.

The spelling of 55442641 in words is "fifty-five million, four hundred forty-two thousand, six hundred forty-one".