51946650 has 192 divisors, whose sum is σ = 171417600. Its totient is φ = 11309760.

The previous prime is 51946637. The next prime is 51946667. The reversal of 51946650 is 5664915.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 217231 + ... + 217469.

It is an arithmetic number, because the mean of its divisors is an integer number (892800).

Almost surely, 2^51946650 is an apocalyptic number.

51946650 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 51946650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85708800).

51946650 is an abundant number, since it is smaller than the sum of its proper divisors (119470950).

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

51946650 is a wasteful number, since it uses less digits than its factorization.

51946650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 51946650 is about 7207.4024447092. The cubic root of 51946650 is about 373.1234249069.

The spelling of 51946650 in words is "fifty-one million, nine hundred forty-six thousand, six hundred fifty".