55420049 has 2 divisors, whose sum is σ = 55420050. Its totient is φ = 55420048.

The previous prime is 55420039. The next prime is 55420063. The reversal of 55420049 is 94002455.

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., 42510400 + 12909649 = 6520^2 + 3593^2 .

It is a cyclic number.

It is not a de Polignac number, because 55420049 - 2¹² = 55415953 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55420039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710024 + 27710025.

It is an arithmetic number, because the mean of its divisors is an integer number (27710025).

Almost surely, 2^55420049 is an apocalyptic number.

It is an amenable number.

55420049 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420049 is an equidigital number, since it uses as much as digits as its factorization.

55420049 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 29.

The square root of 55420049 is about 7444.4643192106. The cubic root of 55420049 is about 381.2609290426.

The spelling of 55420049 in words is "fifty-five million, four hundred twenty thousand, forty-nine".