5551919 has 2 divisors, whose sum is σ = 5551920. Its totient is φ = 5551918.

The previous prime is 5551879. The next prime is 5551921. The reversal of 5551919 is 9191555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5551919 is a prime.

It is a super-2 number, since 2×5551919² = 61647609165122, which contains 22 as substring.

Together with 5551921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5551939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775959 + 2775960.

It is an arithmetic number, because the mean of its divisors is an integer number (2775960).

Almost surely, 2^5551919 is an apocalyptic number.

5551919 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551919 is an equidigital number, since it uses as much as digits as its factorization.

5551919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10125, while the sum is 35.

The square root of 5551919 is about 2356.2510477451. The cubic root of 5551919 is about 177.0711089262.

The spelling of 5551919 in words is "five million, five hundred fifty-one thousand, nine hundred nineteen".