51166550 has 24 divisors (see below), whose sum is σ = 97199136. Its totient is φ = 20030240.

The previous prime is 51166547. The next prime is 51166553. The reversal of 51166550 is 5566115.

It is an interprime number because it is at equal distance from previous prime (51166547) and next prime (51166553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51166553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8537 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (4049964).

Almost surely, 2^51166550 is an apocalyptic number.

51166550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51166550 is a deficient number, since it is larger than the sum of its proper divisors (46032586).

51166550 is a wasteful number, since it uses less digits than its factorization.

51166550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21832 (or 21827 counting only the distinct ones).

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

The square root of 51166550 is about 7153.0797563008. The cubic root of 51166550 is about 371.2462238919.

The spelling of 51166550 in words is "fifty-one million, one hundred sixty-six thousand, five hundred fifty".