65243550 has 24 divisors (see below), whose sum is σ = 161804376. Its totient is φ = 17398240.

The previous prime is 65243539. The next prime is 65243593. The reversal of 65243550 is 5534256.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217329 + ... + 217628.

It is an arithmetic number, because the mean of its divisors is an integer number (6741849).

Almost surely, 2^65243550 is an apocalyptic number.

65243550 is an abundant number, since it is smaller than the sum of its proper divisors (96560826).

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

65243550 is a wasteful number, since it uses less digits than its factorization.

65243550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434972 (or 434967 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 65243550 is about 8077.3479558578. The cubic root of 65243550 is about 402.5741282911.

The spelling of 65243550 in words is "sixty-five million, two hundred forty-three thousand, five hundred fifty".