51511013399 has 2 divisors, whose sum is σ = 51511013400. Its totient is φ = 51511013398.

The previous prime is 51511013347. The next prime is 51511013443. The reversal of 51511013399 is 99331011515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51511013399 - 2⁸ = 51511013143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51511013599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25755506699 + 25755506700.

It is an arithmetic number, because the mean of its divisors is an integer number (25755506700).

Almost surely, 2^51511013399 is an apocalyptic number.

51511013399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51511013399 is an equidigital number, since it uses as much as digits as its factorization.

51511013399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18225, while the sum is 38.

The spelling of 51511013399 in words is "fifty-one billion, five hundred eleven million, thirteen thousand, three hundred ninety-nine".