78222001 has 8 divisors (see below), whose sum is σ = 91897344. Its totient is φ = 65640720.

The previous prime is 78221989. The next prime is 78222007. The reversal of 78222001 is 10022287.

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 78222001 - 2¹³ = 78213809 is a prime.

It is a super-2 number, since 2×78222001² = 12237362880888002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78222007) 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, 273361 + ... + 273646.

It is an arithmetic number, because the mean of its divisors is an integer number (11487168).

Almost surely, 2^78222001 is an apocalyptic number.

It is an amenable number.

78222001 is a deficient number, since it is larger than the sum of its proper divisors (13675343).

78222001 is a wasteful number, since it uses less digits than its factorization.

78222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547031.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 78222001 is about 8844.3202678329. The cubic root of 78222001 is about 427.6708408298.

Adding to 78222001 its reverse (10022287), we get a palindrome (88244288).

The spelling of 78222001 in words is "seventy-eight million, two hundred twenty-two thousand, one".