51380232 has 16 divisors (see below), whose sum is σ = 128450640. Its totient is φ = 17126736.

The previous prime is 51380179. The next prime is 51380233. The reversal of 51380232 is 23208315.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2140843 = 51380232 / (5 + 1 + 3 + 8 + 0 + 2 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (51380233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070398 + ... + 1070445.

It is an arithmetic number, because the mean of its divisors is an integer number (8028165).

Almost surely, 2^51380232 is an apocalyptic number.

It is an amenable number.

51380232 is an abundant number, since it is smaller than the sum of its proper divisors (77070408).

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

51380232 is a wasteful number, since it uses less digits than its factorization.

51380232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140852 (or 2140848 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51380232 is about 7168.0005580357. Note that the first 3 decimals coincide. The cubic root of 51380232 is about 371.7623062428.

Adding to 51380232 its reverse (23208315), we get a palindrome (74588547).

The spelling of 51380232 in words is "fifty-one million, three hundred eighty thousand, two hundred thirty-two".