65519442 has 40 divisors (see below), whose sum is σ = 147629196. Its totient is φ = 21718368.

The previous prime is 65519393. The next prime is 65519459. The reversal of 65519442 is 24491556.

It can be written as a sum of positive squares in 2 ways, for example, as 58660281 + 6859161 = 7659^2 + 2619^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65519397 and 65519406.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30888 + ... + 32940.

Almost surely, 2^65519442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65519442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73814598).

65519442 is an abundant number, since it is smaller than the sum of its proper divisors (82109754).

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

65519442 is a wasteful number, since it uses less digits than its factorization.

65519442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264 (or 2255 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 65519442 is about 8094.4080697726. The cubic root of 65519442 is about 403.1407783981.

The spelling of 65519442 in words is "sixty-five million, five hundred nineteen thousand, four hundred forty-two".