51345532 has 36 divisors (see below), whose sum is σ = 105055104. Its totient is φ = 21893760.

The previous prime is 51345521. The next prime is 51345533. The reversal of 51345532 is 23554315.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 51345532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46693 + ... + 47779.

Almost surely, 2^51345532 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 51345532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52527552).

51345532 is an abundant number, since it is smaller than the sum of its proper divisors (53709572).

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

51345532 is a wasteful number, since it uses less digits than its factorization.

51345532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1337 counting only the distinct ones).

The product of its digits is 9000, while the sum is 28.

The square root of 51345532 is about 7165.5796695034. The cubic root of 51345532 is about 371.6785966351.

Adding to 51345532 its reverse (23554315), we get a palindrome (74899847).

The spelling of 51345532 in words is "fifty-one million, three hundred forty-five thousand, five hundred thirty-two".