55315619 has 2 divisors, whose sum is σ = 55315620. Its totient is φ = 55315618.

The previous prime is 55315613. The next prime is 55315643. The reversal of 55315619 is 91651355.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55315619 is a prime.

It is a super-2 number, since 2×55315619² = 6119635410706322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55315613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27657809 + 27657810.

It is an arithmetic number, because the mean of its divisors is an integer number (27657810).

Almost surely, 2^55315619 is an apocalyptic number.

55315619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55315619 is an equidigital number, since it uses as much as digits as its factorization.

55315619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 35.

The square root of 55315619 is about 7437.4470754419. The cubic root of 55315619 is about 381.0213038884.

The spelling of 55315619 in words is "fifty-five million, three hundred fifteen thousand, six hundred nineteen".