51146550 has 144 divisors (see below), whose sum is σ = 169260000. Its totient is φ = 10782720.

The previous prime is 51146539. The next prime is 51146587. The reversal of 51146550 is 5564115.

It is a happy number.

51146550 is a `hidden beast` number, since 5 + 1 + 1 + 4 + 655 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 40326 + ... + 41574.

Almost surely, 2^51146550 is an apocalyptic number.

51146550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51146550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84630000).

51146550 is an abundant number, since it is smaller than the sum of its proper divisors (118113450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51146550 is a wasteful number, since it uses less digits than its factorization.

51146550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 51146550 is about 7151.6816204303. The cubic root of 51146550 is about 371.1978466343.

It can be divided in two parts, 5114 and 6550, that added together give a square (11664 = 108²).

The spelling of 51146550 in words is "fifty-one million, one hundred forty-six thousand, five hundred fifty".