65351551 has 4 divisors (see below), whose sum is σ = 65540232. Its totient is φ = 65162872.

The previous prime is 65351497. The next prime is 65351567. The reversal of 65351551 is 15515356.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65351551 - 2⁷ = 65351423 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 (65351591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93820 + ... + 94513.

It is an arithmetic number, because the mean of its divisors is an integer number (16385058).

Almost surely, 2^65351551 is an apocalyptic number.

65351551 is a deficient number, since it is larger than the sum of its proper divisors (188681).

65351551 is a wasteful number, since it uses less digits than its factorization.

65351551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188680.

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

The square root of 65351551 is about 8084.0306159737. The cubic root of 65351551 is about 402.7961397123.

The spelling of 65351551 in words is "sixty-five million, three hundred fifty-one thousand, five hundred fifty-one".