51554120 has 16 divisors (see below), whose sum is σ = 115996860. Its totient is φ = 20621632.

The previous prime is 51554117. The next prime is 51554131. The reversal of 51554120 is 2145515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42276004 + 9278116 = 6502^2 + 3046^2 .

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 3 ways as a sum of consecutive naturals, for example, 644387 + ... + 644466.

Almost surely, 2^51554120 is an apocalyptic number.

It is an amenable number.

51554120 is an abundant number, since it is smaller than the sum of its proper divisors (64442740).

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

51554120 is a wasteful number, since it uses less digits than its factorization.

51554120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288864 (or 1288860 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51554120 is about 7180.1197761597. The cubic root of 51554120 is about 372.1812236058.

Adding to 51554120 its reverse (2145515), we get a palindrome (53699635).

The spelling of 51554120 in words is "fifty-one million, five hundred fifty-four thousand, one hundred twenty".