51557130 has 48 divisors (see below), whose sum is σ = 134661384. Its totient is φ = 13685760.

The previous prime is 51557113. The next prime is 51557153. The reversal of 51557130 is 3175515.

It can be written as a sum of positive squares in 4 ways, for example, as 44315649 + 7241481 = 6657^2 + 2691^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51557094 and 51557103.

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 23 ways as a sum of consecutive naturals, for example, 20502 + ... + 22878.

Almost surely, 2^51557130 is an apocalyptic number.

51557130 is an abundant number, since it is smaller than the sum of its proper divisors (83104254).

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

51557130 is a wasteful number, since it uses less digits than its factorization.

51557130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 51557130 is about 7180.3293796316. The cubic root of 51557130 is about 372.1884667623.

The spelling of 51557130 in words is "fifty-one million, five hundred fifty-seven thousand, one hundred thirty".