51552121243 has 12 divisors (see below), whose sum is σ = 61903273152. Its totient is φ = 42762126960.

The previous prime is 51552121211. The next prime is 51552121273. The reversal of 51552121243 is 34212125515.

51552121243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51552121243 - 2⁵ = 51552121211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (51552121273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16967580 + ... + 16970617.

It is an arithmetic number, because the mean of its divisors is an integer number (5158606096).

Almost surely, 2^51552121243 is an apocalyptic number.

51552121243 is a deficient number, since it is larger than the sum of its proper divisors (10351151909).

51552121243 is a wasteful number, since it uses less digits than its factorization.

51552121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33938242 (or 33938235 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

Adding to 51552121243 its reverse (34212125515), we get a palindrome (85764246758).

The spelling of 51552121243 in words is "fifty-one billion, five hundred fifty-two million, one hundred twenty-one thousand, two hundred forty-three".