51107250 has 64 divisors (see below), whose sum is σ = 129257856. Its totient is φ = 13448000.

The previous prime is 51107191. The next prime is 51107257. The reversal of 51107250 is 5270115.

It is a super-2 number, since 2×51107250² = 5223902005125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51107257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61840 + ... + 62660.

It is an arithmetic number, because the mean of its divisors is an integer number (2019654).

Almost surely, 2^51107250 is an apocalyptic number.

51107250 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 51107250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64628928).

51107250 is an abundant number, since it is smaller than the sum of its proper divisors (78150606).

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

51107250 is a wasteful number, since it uses less digits than its factorization.

51107250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51107250 is about 7148.9334868916. The cubic root of 51107250 is about 371.1027485722.

Adding to 51107250 its reverse (5270115), we get a palindrome (56377365).

The spelling of 51107250 in words is "fifty-one million, one hundred seven thousand, two hundred fifty".