55456619 has 2 divisors, whose sum is σ = 55456620. Its totient is φ = 55456618.

The previous prime is 55456589. The next prime is 55456631. The reversal of 55456619 is 91665455.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55456619 is a prime.

It is a super-2 number, since 2×55456619² = 6150873181822322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55456319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27728309 + 27728310.

It is an arithmetic number, because the mean of its divisors is an integer number (27728310).

Almost surely, 2^55456619 is an apocalyptic number.

55456619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55456619 is an equidigital number, since it uses as much as digits as its factorization.

55456619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 55456619 is about 7446.9201016259. The cubic root of 55456619 is about 381.3447714231.

The spelling of 55456619 in words is "fifty-five million, four hundred fifty-six thousand, six hundred nineteen".