51400552 has 64 divisors (see below), whose sum is σ = 114992640. Its totient is φ = 21081600.

The previous prime is 51400507. The next prime is 51400577. The reversal of 51400552 is 25500415.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139873 + ... + 140239.

It is an arithmetic number, because the mean of its divisors is an integer number (1796760).

Almost surely, 2^51400552 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 51400552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57496320).

51400552 is an abundant number, since it is smaller than the sum of its proper divisors (63592088).

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

51400552 is a wasteful number, since it uses less digits than its factorization.

51400552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51400552 is about 7169.4178285269. The cubic root of 51400552 is about 371.8113083209.

Adding to 51400552 its reverse (25500415), we get a palindrome (76900967).

The spelling of 51400552 in words is "fifty-one million, four hundred thousand, five hundred fifty-two".