78213001 has 8 divisors (see below), whose sum is σ = 81544320. Its totient is φ = 74950512.

The previous prime is 78212951. The next prime is 78213007. The reversal of 78213001 is 10031287.

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 78213001 - 2¹¹ = 78210953 is a prime.

It is a super-2 number, since 2×78213001² = 12234547050852002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78213007) 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, 14881 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (10193040).

Almost surely, 2^78213001 is an apocalyptic number.

It is an amenable number.

78213001 is a deficient number, since it is larger than the sum of its proper divisors (3331319).

78213001 is a wasteful number, since it uses less digits than its factorization.

78213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34415.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 78213001 is about 8843.8114520833. The cubic root of 78213001 is about 427.6544380056.

Adding to 78213001 its reverse (10031287), we get a palindrome (88244288).

The spelling of 78213001 in words is "seventy-eight million, two hundred thirteen thousand, one".