65215450530531 has 24 divisors (see below), whose sum is σ = 109173550996224. Its totient is φ = 36741098887920.

The previous prime is 65215450530523. The next prime is 65215450530541. The reversal of 65215450530531 is 13503505451256.

65215450530531 is a `hidden beast` number, since 6 + 5 + 2 + 1 + 545 + 0 + 53 + 0 + 53 + 1 = 666.

It is not a de Polignac number, because 65215450530531 - 2³ = 65215450530523 is a prime.

It is a super-2 number, since 2×65215450530531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65215450530541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7289896101 + ... + 7289905046.

It is an arithmetic number, because the mean of its divisors is an integer number (4548897958176).

Almost surely, 2^{65215450530531} is an apocalyptic number.

65215450530531 is a deficient number, since it is larger than the sum of its proper divisors (43958100465693).

65215450530531 is a wasteful number, since it uses less digits than its factorization.

65215450530531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14579801231 (or 14579801228 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

Adding to 65215450530531 its reverse (13503505451256), we get a palindrome (78718955981787).

The spelling of 65215450530531 in words is "sixty-five trillion, two hundred fifteen billion, four hundred fifty million, five hundred thirty thousand, five hundred thirty-one".