51534220 has 24 divisors (see below), whose sum is σ = 108360000. Its totient is φ = 20587392.

The previous prime is 51534211. The next prime is 51534227. The reversal of 51534220 is 2243515.

It is a junction number, because it is equal to n+sod(n) for n = 51534191 and 51534200.

It is not an unprimeable number, because it can be changed into a prime (51534227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24781 + ... + 26779.

It is an arithmetic number, because the mean of its divisors is an integer number (4515000).

Almost surely, 2^51534220 is an apocalyptic number.

It is an amenable number.

51534220 is an abundant number, since it is smaller than the sum of its proper divisors (56825780).

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

51534220 is a wasteful number, since it uses less digits than its factorization.

51534220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51534220 is about 7178.7338716517. The cubic root of 51534220 is about 372.1333298615.

Adding to 51534220 its reverse (2243515), we get a palindrome (53777735).

The spelling of 51534220 in words is "fifty-one million, five hundred thirty-four thousand, two hundred twenty".