51102326491 has 2 divisors, whose sum is σ = 51102326492. Its totient is φ = 51102326490.

The previous prime is 51102326479. The next prime is 51102326537. The reversal of 51102326491 is 19462320115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51102326491 - 2⁵ = 51102326459 is a prime.

It is a super-2 number, since 2×51102326491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51102326411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551163245 + 25551163246.

It is an arithmetic number, because the mean of its divisors is an integer number (25551163246).

Almost surely, 2^51102326491 is an apocalyptic number.

51102326491 is a deficient number, since it is larger than the sum of its proper divisors (1).

51102326491 is an equidigital number, since it uses as much as digits as its factorization.

51102326491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 51102326491 in words is "fifty-one billion, one hundred two million, three hundred twenty-six thousand, four hundred ninety-one".