51503214 has 48 divisors (see below), whose sum is σ = 123710976. Its totient is φ = 14238000.

The previous prime is 51503213. The next prime is 51503219. The reversal of 51503214 is 41230515.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51503213) 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, 6289 + ... + 11939.

It is an arithmetic number, because the mean of its divisors is an integer number (2577312).

Almost surely, 2^51503214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51503214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61855488).

51503214 is an abundant number, since it is smaller than the sum of its proper divisors (72207762).

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

51503214 is a wasteful number, since it uses less digits than its factorization.

51503214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701 (or 5694 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51503214 is about 7176.5739737008. The cubic root of 51503214 is about 372.0586824987.

Adding to 51503214 its reverse (41230515), we get a palindrome (92733729).

The spelling of 51503214 in words is "fifty-one million, five hundred three thousand, two hundred fourteen".