65051613 has 64 divisors (see below), whose sum is σ = 111974400. Its totient is φ = 36938880.

The previous prime is 65051603. The next prime is 65051627. The reversal of 65051613 is 31615056.

It is a happy number.

65051613 is a `hidden beast` number, since 650 + 5 + 1 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 65051613 - 2¹³ = 65043421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65051603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 607906 + ... + 608012.

It is an arithmetic number, because the mean of its divisors is an integer number (1749600).

Almost surely, 2^65051613 is an apocalyptic number.

It is an amenable number.

65051613 is a deficient number, since it is larger than the sum of its proper divisors (46922787).

65051613 is a wasteful number, since it uses less digits than its factorization.

65051613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 65051613 is about 8065.4580155128. The cubic root of 65051613 is about 402.1789690976.

Adding to 65051613 its reverse (31615056), we get a palindrome (96666669).

It can be divided in two parts, 6505 and 1613, that added together give a palindrome (8118).

The spelling of 65051613 in words is "sixty-five million, fifty-one thousand, six hundred thirteen".