64518131 has 2 divisors, whose sum is σ = 64518132. Its totient is φ = 64518130.

The previous prime is 64518107. The next prime is 64518143. The reversal of 64518131 is 13181546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64518131 - 2¹⁴ = 64501747 is a prime.

It is a super-2 number, since 2×64518131² = 8325178455466322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64518094 and 64518103.

It is not a weakly prime, because it can be changed into another prime (64518191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32259065 + 32259066.

It is an arithmetic number, because the mean of its divisors is an integer number (32259066).

Almost surely, 2^64518131 is an apocalyptic number.

64518131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64518131 is an equidigital number, since it uses as much as digits as its factorization.

64518131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 64518131 is about 8032.3179095452. The cubic root of 64518131 is about 401.0765396401.

Adding to 64518131 its reverse (13181546), we get a palindrome (77699677).

The spelling of 64518131 in words is "sixty-four million, five hundred eighteen thousand, one hundred thirty-one".