65222040 has 64 divisors (see below), whose sum is σ = 210722400. Its totient is φ = 16054272.

The previous prime is 65222033. The next prime is 65222057. The reversal of 65222040 is 4022256.

It is a junction number, because it is equal to n+sod(n) for n = 65221998 and 65222016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19345 + ... + 22464.

Almost surely, 2^65222040 is an apocalyptic number.

65222040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65222040 is an abundant number, since it is smaller than the sum of its proper divisors (145500360).

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

65222040 is a wasteful number, since it uses less digits than its factorization.

65222040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41836 (or 41832 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 65222040 is about 8076.0163447086. The cubic root of 65222040 is about 402.5298821738.

Adding to 65222040 its reverse (4022256), we get a palindrome (69244296).

The spelling of 65222040 in words is "sixty-five million, two hundred twenty-two thousand, forty".