51030732 has 96 divisors (see below), whose sum is σ = 132088320. Its totient is φ = 15275520.

The previous prime is 51030671. The next prime is 51030737. The reversal of 51030732 is 23703015.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51030699 and 51030708.

It is not an unprimeable number, because it can be changed into a prime (51030737) 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, 495393 + ... + 495495.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^51030732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51030732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66044160).

51030732 is an abundant number, since it is smaller than the sum of its proper divisors (81057588).

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

51030732 is a wasteful number, since it uses less digits than its factorization.

51030732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 51030732 is about 7143.5797748748. The cubic root of 51030732 is about 370.9174505080.

Adding to 51030732 its reverse (23703015), we get a palindrome (74733747).

The spelling of 51030732 in words is "fifty-one million, thirty thousand, seven hundred thirty-two".