65131104 has 48 divisors (see below), whose sum is σ = 172307520. Its totient is φ = 21540480.

The previous prime is 65131081. The next prime is 65131109. The reversal of 65131104 is 40113156.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65131109) 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, 9987 + ... + 15165.

It is an arithmetic number, because the mean of its divisors is an integer number (3589740).

Almost surely, 2^65131104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65131104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86153760).

65131104 is an abundant number, since it is smaller than the sum of its proper divisors (107176416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65131104 is a wasteful number, since it uses less digits than its factorization.

65131104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323 (or 5315 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 65131104 is about 8070.3843774631. The cubic root of 65131104 is about 402.3427190486.

The spelling of 65131104 in words is "sixty-five million, one hundred thirty-one thousand, one hundred four".