78211263 has 8 divisors (see below), whose sum is σ = 112303408. Its totient is φ = 48129984.

The previous prime is 78211193. The next prime is 78211267. The reversal of 78211263 is 36211287.

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

It is not a de Polignac number, because 78211263 - 2⁹ = 78210751 is a prime.

It is a super-2 number, since 2×78211263² = 12234003320110338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78211263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78211267) 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, 1002670 + ... + 1002747.

It is an arithmetic number, because the mean of its divisors is an integer number (14037926).

Almost surely, 2^78211263 is an apocalyptic number.

78211263 is a deficient number, since it is larger than the sum of its proper divisors (34092145).

78211263 is a wasteful number, since it uses less digits than its factorization.

78211263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005433.

The product of its digits is 4032, while the sum is 30.

The square root of 78211263 is about 8843.7131907361. The cubic root of 78211263 is about 427.6512702930.

The spelling of 78211263 in words is "seventy-eight million, two hundred eleven thousand, two hundred sixty-three".