64145131 has 4 divisors (see below), whose sum is σ = 67918392. Its totient is φ = 60371872.

The previous prime is 64145119. The next prime is 64145141. The reversal of 64145131 is 13154146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13154146 = 2 ⋅6577073.

It is a cyclic number.

It is not a de Polignac number, because 64145131 - 2¹¹ = 64143083 is a prime.

It is a super-2 number, since 2×64145131² = 8229195662014322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64145096 and 64145105.

It is not an unprimeable number, because it can be changed into a prime (64145101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886605 + ... + 1886638.

It is an arithmetic number, because the mean of its divisors is an integer number (16979598).

Almost surely, 2^64145131 is an apocalyptic number.

64145131 is a deficient number, since it is larger than the sum of its proper divisors (3773261).

64145131 is a wasteful number, since it uses less digits than its factorization.

64145131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773260.

The product of its digits is 1440, while the sum is 25.

The square root of 64145131 is about 8009.0655509866. The cubic root of 64145131 is about 400.3021279892.

Adding to 64145131 its reverse (13154146), we get a palindrome (77299277).

The spelling of 64145131 in words is "sixty-four million, one hundred forty-five thousand, one hundred thirty-one".