51025243530 has 16 divisors (see below), whose sum is σ = 122460584544. Its totient is φ = 13606731600.

The previous prime is 51025243519. The next prime is 51025243543. The reversal of 51025243530 is 3534252015.

It is a super-3 number, since 3×51025243530³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1700841451 = 51025243530 / (5 + 1 + 0 + 2 + 5 + 2 + 4 + 3 + 5 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850420696 + ... + 850420755.

It is an arithmetic number, because the mean of its divisors is an integer number (7653786534).

Almost surely, 2^51025243530 is an apocalyptic number.

51025243530 is an abundant number, since it is smaller than the sum of its proper divisors (71435341014).

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

51025243530 is a wasteful number, since it uses less digits than its factorization.

51025243530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700841461.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 51025243530 its reverse (3534252015), we get a palindrome (54559495545).

The spelling of 51025243530 in words is "fifty-one billion, twenty-five million, two hundred forty-three thousand, five hundred thirty".