65520424 has 16 divisors (see below), whose sum is σ = 122987700. Its totient is φ = 32723712.

The previous prime is 65520421. The next prime is 65520461. The reversal of 65520424 is 42402556.

It can be written as a sum of positive squares in 2 ways, for example, as 64288324 + 1232100 = 8018^2 + 1110^2 .

It is a super-2 number, since 2×65520424² = 8585851922279552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65520392 and 65520401.

It is not an unprimeable number, because it can be changed into a prime (65520421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4014 + ... + 12130.

Almost surely, 2^65520424 is an apocalyptic number.

It is an amenable number.

65520424 is a deficient number, since it is larger than the sum of its proper divisors (57467276).

65520424 is a wasteful number, since it uses less digits than its factorization.

65520424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9132 (or 9128 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 65520424 is about 8094.4687287060. The cubic root of 65520424 is about 403.1427924683.

The spelling of 65520424 in words is "sixty-five million, five hundred twenty thousand, four hundred twenty-four".