51116250 has 80 divisors (see below), whose sum is σ = 131133024. Its totient is φ = 13272000.

The previous prime is 51116249. The next prime is 51116257. The reversal of 51116250 is 5261115.

It is a super-2 number, since 2×51116250² = 5225742028125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51116257) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 161092 + ... + 161408.

Almost surely, 2^51116250 is an apocalyptic number.

51116250 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 51116250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65566512).

51116250 is an abundant number, since it is smaller than the sum of its proper divisors (80016774).

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

51116250 is a wasteful number, since it uses less digits than its factorization.

51116250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 51116250 is about 7149.5629237038. The cubic root of 51116250 is about 371.1245310571.

Adding to 51116250 its reverse (5261115), we get a palindrome (56377365).

It can be divided in two parts, 511 and 16250, that added together give a palindrome (16761).

The spelling of 51116250 in words is "fifty-one million, one hundred sixteen thousand, two hundred fifty".