65215213040 has 40 divisors (see below), whose sum is σ = 151915382448. Its totient is φ = 26036190720.

The previous prime is 65215213031. The next prime is 65215213057. The reversal of 65215213040 is 4031251256.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×65215213040³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65215212994 and 65215213012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 737501 + ... + 821180.

Almost surely, 2^65215213040 is an apocalyptic number.

It is an amenable number.

65215213040 is an abundant number, since it is smaller than the sum of its proper divisors (86700169408).

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

65215213040 is a wasteful number, since it uses less digits than its factorization.

65215213040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559217 (or 1559211 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 65215213040 its reverse (4031251256), we get a palindrome (69246464296).

The spelling of 65215213040 in words is "sixty-five billion, two hundred fifteen million, two hundred thirteen thousand, forty".