51973396187 has 2 divisors, whose sum is σ = 51973396188. Its totient is φ = 51973396186.

The previous prime is 51973396129. The next prime is 51973396193. The reversal of 51973396187 is 78169337915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51973396187 - 2²⁰ = 51972347611 is a prime.

It is a super-2 number, since 2×51973396187² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51973396687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25986698093 + 25986698094.

It is an arithmetic number, because the mean of its divisors is an integer number (25986698094).

Almost surely, 2^51973396187 is an apocalyptic number.

51973396187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51973396187 is an equidigital number, since it uses as much as digits as its factorization.

51973396187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 59.

The spelling of 51973396187 in words is "fifty-one billion, nine hundred seventy-three million, three hundred ninety-six thousand, one hundred eighty-seven".