51552166 has 4 divisors (see below), whose sum is σ = 77328252. Its totient is φ = 25776082.

The previous prime is 51552133. The next prime is 51552191. The reversal of 51552166 is 66125515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66125515 = 5 ⋅13225103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888040 + ... + 12888043.

It is an arithmetic number, because the mean of its divisors is an integer number (19332063).

Almost surely, 2^51552166 is an apocalyptic number.

51552166 is a deficient number, since it is larger than the sum of its proper divisors (25776086).

51552166 is a wasteful number, since it uses less digits than its factorization.

51552166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25776085.

The product of its digits is 9000, while the sum is 31.

The square root of 51552166 is about 7179.9837047169. The cubic root of 51552166 is about 372.1765214190.

The spelling of 51552166 in words is "fifty-one million, five hundred fifty-two thousand, one hundred sixty-six".