77215201 has 8 divisors (see below), whose sum is σ = 89156480. Its totient is φ = 65501568.

The previous prime is 77215157. The next prime is 77215211. The reversal of 77215201 is 10251277.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77215201 - 2¹¹ = 77213153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77215211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56181 + ... + 57538.

It is an arithmetic number, because the mean of its divisors is an integer number (11144560).

Almost surely, 2^77215201 is an apocalyptic number.

It is an amenable number.

77215201 is a deficient number, since it is larger than the sum of its proper divisors (11941279).

77215201 is a wasteful number, since it uses less digits than its factorization.

77215201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113823.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 77215201 is about 8787.2180466858. The cubic root of 77215201 is about 425.8280529657.

Adding to 77215201 its reverse (10251277), we get a palindrome (87466478).

The spelling of 77215201 in words is "seventy-seven million, two hundred fifteen thousand, two hundred one".