51938691071 has 2 divisors, whose sum is σ = 51938691072. Its totient is φ = 51938691070.

The previous prime is 51938691067. The next prime is 51938691097. The reversal of 51938691071 is 17019683915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51938691071 - 2² = 51938691067 is a prime.

It is a super-3 number, since 3×51938691071³ (a number of 33 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51938691041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25969345535 + 25969345536.

It is an arithmetic number, because the mean of its divisors is an integer number (25969345536).

Almost surely, 2^51938691071 is an apocalyptic number.

51938691071 is a deficient number, since it is larger than the sum of its proper divisors (1).

51938691071 is an equidigital number, since it uses as much as digits as its factorization.

51938691071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 51938691071 in words is "fifty-one billion, nine hundred thirty-eight million, six hundred ninety-one thousand, seventy-one".