65351813 has 4 divisors (see below), whose sum is σ = 67459968. Its totient is φ = 63243660.

The previous prime is 65351807. The next prime is 65351831. The reversal of 65351813 is 31815356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65351813 - 2¹⁴ = 65335429 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65351813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65351833) 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, 1054031 + ... + 1054092.

It is an arithmetic number, because the mean of its divisors is an integer number (16864992).

Almost surely, 2^65351813 is an apocalyptic number.

It is an amenable number.

65351813 is a deficient number, since it is larger than the sum of its proper divisors (2108155).

65351813 is a wasteful number, since it uses less digits than its factorization.

65351813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108154.

The product of its digits is 10800, while the sum is 32.

The square root of 65351813 is about 8084.0468207452. The cubic root of 65351813 is about 402.7966779931.

The spelling of 65351813 in words is "sixty-five million, three hundred fifty-one thousand, eight hundred thirteen".