65223730 has 64 divisors (see below), whose sum is σ = 146095488. Its totient is φ = 20597760.

The previous prime is 65223703. The next prime is 65223731. The reversal of 65223730 is 3732256.

It is a super-2 number, since 2×65223730² = 8508269910225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65223731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22969 + ... + 25651.

It is an arithmetic number, because the mean of its divisors is an integer number (2282742).

Almost surely, 2^65223730 is an apocalyptic number.

65223730 is an abundant number, since it is smaller than the sum of its proper divisors (80871758).

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

65223730 is a wasteful number, since it uses less digits than its factorization.

65223730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 65223730 is about 8076.1209748245. The cubic root of 65223730 is about 402.5333588596.

Adding to 65223730 its reverse (3732256), we get a palindrome (68955986).

The spelling of 65223730 in words is "sixty-five million, two hundred twenty-three thousand, seven hundred thirty".