5615551 has 2 divisors, whose sum is σ = 5615552. Its totient is φ = 5615550.

The previous prime is 5615549. The next prime is 5615563. The reversal of 5615551 is 1555165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5615551 - 2¹ = 5615549 is a prime.

Together with 5615549, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5615521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2807775 + 2807776.

It is an arithmetic number, because the mean of its divisors is an integer number (2807776).

Almost surely, 2^5615551 is an apocalyptic number.

5615551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615551 is an equidigital number, since it uses as much as digits as its factorization.

5615551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3750, while the sum is 28.

The square root of 5615551 is about 2369.7153837539. The cubic root of 5615551 is about 177.7450269385.

The spelling of 5615551 in words is "five million, six hundred fifteen thousand, five hundred fifty-one".