65521450 has 48 divisors (see below), whose sum is σ = 126715104. Its totient is φ = 25185600.

The previous prime is 65521429. The next prime is 65521513. The reversal of 65521450 is 5412556.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197785 + ... + 198115.

It is an arithmetic number, because the mean of its divisors is an integer number (2639898).

Almost surely, 2^65521450 is an apocalyptic number.

65521450 is a deficient number, since it is larger than the sum of its proper divisors (61193654).

65521450 is a wasteful number, since it uses less digits than its factorization.

65521450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 65521450 is about 8094.5321050694. The cubic root of 65521450 is about 403.1448967605.

The spelling of 65521450 in words is "sixty-five million, five hundred twenty-one thousand, four hundred fifty".