78052201 has 4 divisors (see below), whose sum is σ = 78096004. Its totient is φ = 78008400.

The previous prime is 78052187. The next prime is 78052207. The reversal of 78052201 is 10225087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10225087 = 23 ⋅444569.

It can be written as a sum of positive squares in 2 ways, for example, as 524176 + 77528025 = 724^2 + 8805^2 .

It is a cyclic number.

It is not a de Polignac number, because 78052201 - 2¹¹ = 78050153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78052207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19110 + ... + 22831.

It is an arithmetic number, because the mean of its divisors is an integer number (19524001).

Almost surely, 2^78052201 is an apocalyptic number.

It is an amenable number.

78052201 is a deficient number, since it is larger than the sum of its proper divisors (43803).

78052201 is a wasteful number, since it uses less digits than its factorization.

78052201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43802.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 78052201 is about 8834.7156717124. The cubic root of 78052201 is about 427.3611618958.

Adding to 78052201 its reverse (10225087), we get a palindrome (88277288).

The spelling of 78052201 in words is "seventy-eight million, fifty-two thousand, two hundred one".