51552143505 has 48 divisors (see below), whose sum is σ = 90606035520. Its totient is φ = 27112579200.

The previous prime is 51552143453. The next prime is 51552143507. The reversal of 51552143505 is 50534125515.

51552143505 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 2 + 143 + 505 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-51552143505 is a prime.

It is a super-2 number, since 2×51552143505² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51552143505.

It is not an unprimeable number, because it can be changed into a prime (51552143507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1010050 + ... + 1059860.

It is an arithmetic number, because the mean of its divisors is an integer number (1887625740).

Almost surely, 2^51552143505 is an apocalyptic number.

It is an amenable number.

51552143505 is a deficient number, since it is larger than the sum of its proper divisors (39053892015).

51552143505 is a wasteful number, since it uses less digits than its factorization.

51552143505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50142 (or 50139 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 51552143505 in words is "fifty-one billion, five hundred fifty-two million, one hundred forty-three thousand, five hundred five".