51445532 has 12 divisors (see below), whose sum is σ = 90237840. Its totient is φ = 25663296.

The previous prime is 51445531. The next prime is 51445561. The reversal of 51445532 is 23554415.

It is a junction number, because it is equal to n+sod(n) for n = 51445495 and 51445504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445531) 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, 12893 + ... + 16404.

It is an arithmetic number, because the mean of its divisors is an integer number (7519820).

Almost surely, 2^51445532 is an apocalyptic number.

It is an amenable number.

51445532 is a deficient number, since it is larger than the sum of its proper divisors (38792308).

51445532 is a wasteful number, since it uses less digits than its factorization.

51445532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29740 (or 29738 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 51445532 is about 7172.5540778721. The cubic root of 51445532 is about 371.9197325565.

Adding to 51445532 its reverse (23554415), we get a palindrome (74999947).

The spelling of 51445532 in words is "fifty-one million, four hundred forty-five thousand, five hundred thirty-two".