51042225551 has 2 divisors, whose sum is σ = 51042225552. Its totient is φ = 51042225550.

The previous prime is 51042225529. The next prime is 51042225583. The reversal of 51042225551 is 15552224015.

It is a happy number.

It is an a-pointer prime, because the next prime (51042225583) can be obtained adding 51042225551 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51042225551 - 2¹⁴ = 51042209167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51042225511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25521112775 + 25521112776.

It is an arithmetic number, because the mean of its divisors is an integer number (25521112776).

Almost surely, 2^51042225551 is an apocalyptic number.

51042225551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51042225551 is an equidigital number, since it uses as much as digits as its factorization.

51042225551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 51042225551 its reverse (15552224015), we get a palindrome (66594449566).

The spelling of 51042225551 in words is "fifty-one billion, forty-two million, two hundred twenty-five thousand, five hundred fifty-one".