65312250 has 32 divisors (see below), whose sum is σ = 163021248. Its totient is φ = 17416400.

The previous prime is 65312243. The next prime is 65312251. The reversal of 65312250 is 5221356.

It is a super-4 number, since 4×65312250⁴ (a number of 32 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65312250.

It is not an unprimeable number, because it can be changed into a prime (65312251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42792 + ... + 44291.

It is an arithmetic number, because the mean of its divisors is an integer number (5094414).

Almost surely, 2^65312250 is an apocalyptic number.

65312250 is an abundant number, since it is smaller than the sum of its proper divisors (97708998).

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

65312250 is a wasteful number, since it uses less digits than its factorization.

65312250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87103 (or 87093 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 65312250 is about 8081.5994704019. The cubic root of 65312250 is about 402.7153792446.

The spelling of 65312250 in words is "sixty-five million, three hundred twelve thousand, two hundred fifty".