55312519 has 2 divisors, whose sum is σ = 55312520. Its totient is φ = 55312518.

The previous prime is 55312511. The next prime is 55312529. The reversal of 55312519 is 91521355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55312519 - 2³ = 55312511 is a prime.

It is a super-2 number, since 2×55312519² = 6118949516250722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55312511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27656259 + 27656260.

It is an arithmetic number, because the mean of its divisors is an integer number (27656260).

Almost surely, 2^55312519 is an apocalyptic number.

55312519 is a deficient number, since it is larger than the sum of its proper divisors (1).

55312519 is an equidigital number, since it uses as much as digits as its factorization.

55312519 is an odious number, because the sum of its binary digits is odd.

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

The square root of 55312519 is about 7437.2386676777. The cubic root of 55312519 is about 381.0141860187.

The spelling of 55312519 in words is "fifty-five million, three hundred twelve thousand, five hundred nineteen".