51001235387 has 2 divisors, whose sum is σ = 51001235388. Its totient is φ = 51001235386.

The previous prime is 51001235377. The next prime is 51001235401. The reversal of 51001235387 is 78353210015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51001235387 - 2²² = 50997041083 is a prime.

It is a super-2 number, since 2×51001235387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51001235347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500617693 + 25500617694.

It is an arithmetic number, because the mean of its divisors is an integer number (25500617694).

Almost surely, 2^51001235387 is an apocalyptic number.

51001235387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51001235387 is an equidigital number, since it uses as much as digits as its factorization.

51001235387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 51001235387 in words is "fifty-one billion, one million, two hundred thirty-five thousand, three hundred eighty-seven".