78551211 has 8 divisors (see below), whose sum is σ = 104784784. Its totient is φ = 52342560.

The previous prime is 78551197. The next prime is 78551219. The reversal of 78551211 is 11215587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-78551211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78551219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3141 + ... + 12921.

It is an arithmetic number, because the mean of its divisors is an integer number (13098098).

Almost surely, 2^78551211 is an apocalyptic number.

78551211 is a deficient number, since it is larger than the sum of its proper divisors (26233573).

78551211 is a wasteful number, since it uses less digits than its factorization.

78551211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12461.

The product of its digits is 2800, while the sum is 30.

The square root of 78551211 is about 8862.9121060744. The cubic root of 78551211 is about 428.2699751688.

Adding to 78551211 its reverse (11215587), we get a palindrome (89766798).

The spelling of 78551211 in words is "seventy-eight million, five hundred fifty-one thousand, two hundred eleven".