78525211 has 4 divisors (see below), whose sum is σ = 80647552. Its totient is φ = 76402872.

The previous prime is 78525191. The next prime is 78525217. The reversal of 78525211 is 11252587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11252587 = 367 ⋅30661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78525211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78525217) 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, 1061115 + ... + 1061188.

It is an arithmetic number, because the mean of its divisors is an integer number (20161888).

Almost surely, 2^78525211 is an apocalyptic number.

78525211 is a deficient number, since it is larger than the sum of its proper divisors (2122341).

78525211 is a wasteful number, since it uses less digits than its factorization.

78525211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122340.

The product of its digits is 5600, while the sum is 31.

The square root of 78525211 is about 8861.4451981604. The cubic root of 78525211 is about 428.2227183199. Note that the first 3 decimals are identical.

Adding to 78525211 its reverse (11252587), we get a palindrome (89777798).

The spelling of 78525211 in words is "seventy-eight million, five hundred twenty-five thousand, two hundred eleven".