76222221 has 8 divisors (see below), whose sum is σ = 101678304. Its totient is φ = 50790480.

The previous prime is 76222217. The next prime is 76222247. The reversal of 76222221 is 12222267.

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

It is not a de Polignac number, because 76222221 - 2² = 76222217 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 76222191 and 76222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76222021) 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, 3286 + ... + 12776.

It is an arithmetic number, because the mean of its divisors is an integer number (12709788).

Almost surely, 2^76222221 is an apocalyptic number.

It is an amenable number.

76222221 is a deficient number, since it is larger than the sum of its proper divisors (25456083).

76222221 is a wasteful number, since it uses less digits than its factorization.

76222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171.

The product of its digits is 1344, while the sum is 24.

The square root of 76222221 is about 8730.5338324755. The cubic root of 76222221 is about 423.9948027279.

Adding to 76222221 its reverse (12222267), we get a palindrome (88444488).

The spelling of 76222221 in words is "seventy-six million, two hundred twenty-two thousand, two hundred twenty-one".