51631280123 has 2 divisors, whose sum is σ = 51631280124. Its totient is φ = 51631280122.

The previous prime is 51631280117. The next prime is 51631280153. The reversal of 51631280123 is 32108213615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51631280123 - 2⁶ = 51631280059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51631280123.

It is not a weakly prime, because it can be changed into another prime (51631280153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815640061 + 25815640062.

It is an arithmetic number, because the mean of its divisors is an integer number (25815640062).

Almost surely, 2^51631280123 is an apocalyptic number.

51631280123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51631280123 is an equidigital number, since it uses as much as digits as its factorization.

51631280123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 51631280123 its reverse (32108213615), we get a palindrome (83739493738).

The spelling of 51631280123 in words is "fifty-one billion, six hundred thirty-one million, two hundred eighty thousand, one hundred twenty-three".