51340230 has 80 divisors (see below), whose sum is σ = 139148064. Its totient is φ = 13582080.

The previous prime is 51340229. The next prime is 51340249. The reversal of 51340230 is 3204315.

It is a super-3 number, since 3×51340230³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 195079 + ... + 195341.

Almost surely, 2^51340230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51340230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69574032).

51340230 is an abundant number, since it is smaller than the sum of its proper divisors (87807834).

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

51340230 is a wasteful number, since it uses less digits than its factorization.

51340230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51340230 is about 7165.2096968616. The cubic root of 51340230 is about 371.6658028718.

Adding to 51340230 its reverse (3204315), we get a palindrome (54544545).

The spelling of 51340230 in words is "fifty-one million, three hundred forty thousand, two hundred thirty".