51890550 has 24 divisors (see below), whose sum is σ = 128688936. Its totient is φ = 13837440.

The previous prime is 51890519. The next prime is 51890557. The reversal of 51890550 is 5509815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51890557) 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, 172819 + ... + 173118.

It is an arithmetic number, because the mean of its divisors is an integer number (5362039).

Almost surely, 2^51890550 is an apocalyptic number.

51890550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51890550 is an abundant number, since it is smaller than the sum of its proper divisors (76798386).

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

51890550 is a wasteful number, since it uses less digits than its factorization.

51890550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345952 (or 345947 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 51890550 is about 7203.5095613180. The cubic root of 51890550 is about 372.9890577953.

The spelling of 51890550 in words is "fifty-one million, eight hundred ninety thousand, five hundred fifty".