51022515240 has 48 divisors (see below), whose sum is σ = 165823175700. Its totient is φ = 13606003968.

The previous prime is 51022515223. The next prime is 51022515253. The reversal of 51022515240 is 4251522015.

51022515240 is a `hidden beast` number, since 5 + 102 + 2 + 515 + 2 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49260026916 + 1762488324 = 221946^2 + 41982^2 .

It is a super-2 number, since 2×51022515240² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70864245 + ... + 70864964.

Almost surely, 2^51022515240 is an apocalyptic number.

It is an amenable number.

51022515240 is an abundant number, since it is smaller than the sum of its proper divisors (114800660460).

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

51022515240 is a wasteful number, since it uses less digits than its factorization.

51022515240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141729226 (or 141729219 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 51022515240 in words is "fifty-one billion, twenty-two million, five hundred fifteen thousand, two hundred forty".