51386147 has 2 divisors, whose sum is σ = 51386148. Its totient is φ = 51386146.

The previous prime is 51386131. The next prime is 51386171. The reversal of 51386147 is 74168315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51386147 - 2⁴ = 51386131 is a prime.

It is a super-2 number, since 2×51386147² = 5281072207011218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51386107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25693073 + 25693074.

It is an arithmetic number, because the mean of its divisors is an integer number (25693074).

Almost surely, 2^51386147 is an apocalyptic number.

51386147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51386147 is an equidigital number, since it uses as much as digits as its factorization.

51386147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 51386147 is about 7168.4131437857. The cubic root of 51386147 is about 371.7765717140.

The spelling of 51386147 in words is "fifty-one million, three hundred eighty-six thousand, one hundred forty-seven".