65135551 has 8 divisors (see below), whose sum is σ = 74272464. Its totient is φ = 56588160.

The previous prime is 65135549. The next prime is 65135599. The reversal of 65135551 is 15553156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65135551 - 2¹ = 65135549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65135051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147145 + ... + 147586.

It is an arithmetic number, because the mean of its divisors is an integer number (9284058).

Almost surely, 2^65135551 is an apocalyptic number.

65135551 is a deficient number, since it is larger than the sum of its proper divisors (9136913).

65135551 is a wasteful number, since it uses less digits than its factorization.

65135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294761.

The product of its digits is 11250, while the sum is 31.

The square root of 65135551 is about 8070.6598862794. The cubic root of 65135551 is about 402.3518758480.

The spelling of 65135551 in words is "sixty-five million, one hundred thirty-five thousand, five hundred fifty-one".