51494550 has 48 divisors (see below), whose sum is σ = 128390592. Its totient is φ = 13658400.

The previous prime is 51494537. The next prime is 51494557. The reversal of 51494550 is 5549415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30837 + ... + 32463.

It is an arithmetic number, because the mean of its divisors is an integer number (2674804).

Almost surely, 2^51494550 is an apocalyptic number.

51494550 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 51494550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64195296).

51494550 is an abundant number, since it is smaller than the sum of its proper divisors (76896042).

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

51494550 is a wasteful number, since it uses less digits than its factorization.

51494550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1848 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 51494550 is about 7175.9703176644. The cubic root of 51494550 is about 372.0378184467.

The spelling of 51494550 in words is "fifty-one million, four hundred ninety-four thousand, five hundred fifty".