51836387 has 2 divisors, whose sum is σ = 51836388. Its totient is φ = 51836386.

The previous prime is 51836381. The next prime is 51836401. The reversal of 51836387 is 78363815.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51836387 is a prime.

It is a super-2 number, since 2×51836387² = 5374022034427538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51836381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25918193 + 25918194.

It is an arithmetic number, because the mean of its divisors is an integer number (25918194).

Almost surely, 2^51836387 is an apocalyptic number.

51836387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51836387 is an equidigital number, since it uses as much as digits as its factorization.

51836387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 51836387 is about 7199.7490928504. The cubic root of 51836387 is about 372.8592381436.

The spelling of 51836387 in words is "fifty-one million, eight hundred thirty-six thousand, three hundred eighty-seven".