51533566 has 16 divisors (see below), whose sum is σ = 89020800. Its totient is φ = 21916440.

The previous prime is 51533561. The next prime is 51533569. The reversal of 51533566 is 66533515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51533561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12216 + ... + 15883.

It is an arithmetic number, because the mean of its divisors is an integer number (5563800).

Almost surely, 2^51533566 is an apocalyptic number.

51533566 is a deficient number, since it is larger than the sum of its proper divisors (37487234).

51533566 is a wasteful number, since it uses less digits than its factorization.

51533566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28239.

The product of its digits is 40500, while the sum is 34.

The square root of 51533566 is about 7178.6883202992. The cubic root of 51533566 is about 372.1317556568.

The spelling of 51533566 in words is "fifty-one million, five hundred thirty-three thousand, five hundred sixty-six".