51135025651 has 2 divisors, whose sum is σ = 51135025652. Its totient is φ = 51135025650.

The previous prime is 51135025639. The next prime is 51135025693. The reversal of 51135025651 is 15652053115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51135025651 - 2³¹ = 48987542003 is a prime.

It is a super-2 number, since 2×51135025651² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51135025631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25567512825 + 25567512826.

It is an arithmetic number, because the mean of its divisors is an integer number (25567512826).

Almost surely, 2^51135025651 is an apocalyptic number.

51135025651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51135025651 is an equidigital number, since it uses as much as digits as its factorization.

51135025651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

Adding to 51135025651 its reverse (15652053115), we get a palindrome (66787078766).

The spelling of 51135025651 in words is "fifty-one billion, one hundred thirty-five million, twenty-five thousand, six hundred fifty-one".