51550452 has 48 divisors (see below), whose sum is σ = 139466880. Its totient is φ = 16435584.

The previous prime is 51550417. The next prime is 51550469. The reversal of 51550452 is 25405515.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7893 + ... + 12860.

It is an arithmetic number, because the mean of its divisors is an integer number (2905560).

Almost surely, 2^51550452 is an apocalyptic number.

It is an amenable number.

51550452 is an abundant number, since it is smaller than the sum of its proper divisors (87916428).

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

51550452 is a wasteful number, since it uses less digits than its factorization.

51550452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789 (or 20781 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 51550452 is about 7179.8643441224. The cubic root of 51550452 is about 372.1723966804.

Adding to 51550452 its reverse (25405515), we get a palindrome (76955967).

The spelling of 51550452 in words is "fifty-one million, five hundred fifty thousand, four hundred fifty-two".