68152221 has 24 divisors (see below), whose sum is σ = 104569920. Its totient is φ = 42650496.

The previous prime is 68152219. The next prime is 68152277. The reversal of 68152221 is 12225186.

It is a happy number.

It is not a de Polignac number, because 68152221 - 2¹ = 68152219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68152321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17560 + ... + 21086.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080).

Almost surely, 2^68152221 is an apocalyptic number.

It is an amenable number.

68152221 is a deficient number, since it is larger than the sum of its proper divisors (36417699).

68152221 is a wasteful number, since it uses less digits than its factorization.

68152221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665 (or 3662 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 68152221 is about 8255.4358455505. The cubic root of 68152221 is about 408.4698487135.

The spelling of 68152221 in words is "sixty-eight million, one hundred fifty-two thousand, two hundred twenty-one".