65231772 has 48 divisors (see below), whose sum is σ = 160161792. Its totient is φ = 20623680.

The previous prime is 65231767. The next prime is 65231791. The reversal of 65231772 is 27713256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34122 + ... + 35982.

It is an arithmetic number, because the mean of its divisors is an integer number (3336704).

Almost surely, 2^65231772 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 65231772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80080896).

65231772 is an abundant number, since it is smaller than the sum of its proper divisors (94930020).

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

65231772 is a wasteful number, since it uses less digits than its factorization.

65231772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 2016 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 65231772 is about 8076.6188470176. The cubic root of 65231772 is about 402.5499021240.

The spelling of 65231772 in words is "sixty-five million, two hundred thirty-one thousand, seven hundred seventy-two".