51140232 has 96 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 14302080.

The previous prime is 51140231. The next prime is 51140237. The reversal of 51140232 is 23204115.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140231) 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, 7813 + ... + 12779.

It is an arithmetic number, because the mean of its divisors is an integer number (1695330).

Almost surely, 2^51140232 is an apocalyptic number.

51140232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51140232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81375840).

51140232 is an abundant number, since it is smaller than the sum of its proper divisors (111611448).

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

51140232 is a wasteful number, since it uses less digits than its factorization.

51140232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003 (or 4996 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51140232 is about 7151.2398924942. The cubic root of 51140232 is about 371.1825616374.

Adding to 51140232 its reverse (23204115), we get a palindrome (74344347).

The spelling of 51140232 in words is "fifty-one million, one hundred forty thousand, two hundred thirty-two".