5166551 has 4 divisors (see below), whose sum is σ = 5563992. Its totient is φ = 4769112.

The previous prime is 5166541. The next prime is 5166563. The reversal of 5166551 is 1556615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1556615 = 5 ⋅311323.

It is a cyclic number.

It is not a de Polignac number, because 5166551 - 2¹⁰ = 5165527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5166541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198701 + ... + 198726.

It is an arithmetic number, because the mean of its divisors is an integer number (1390998).

Almost surely, 2^5166551 is an apocalyptic number.

5166551 is a deficient number, since it is larger than the sum of its proper divisors (397441).

5166551 is a wasteful number, since it uses less digits than its factorization.

5166551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397440.

The product of its digits is 4500, while the sum is 29.

The square root of 5166551 is about 2273.0048394141. The cubic root of 5166551 is about 172.8755495082.

The spelling of 5166551 in words is "five million, one hundred sixty-six thousand, five hundred fifty-one".