7123216319 has 4 divisors (see below), whose sum is σ = 7123997544. Its totient is φ = 7122435096.

The previous prime is 7123216273. The next prime is 7123216333. The reversal of 7123216319 is 9136123217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9136123217 = 13 ⋅702778709.

It is a cyclic number.

It is not a de Polignac number, because 7123216319 - 2²⁰ = 7122167743 is a prime.

It is a super-2 number, since 2×7123216319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7123216339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376772 + ... + 395225.

It is an arithmetic number, because the mean of its divisors is an integer number (1780999386).

Almost surely, 2^7123216319 is an apocalyptic number.

7123216319 is a deficient number, since it is larger than the sum of its proper divisors (781225).

7123216319 is an equidigital number, since it uses as much as digits as its factorization.

7123216319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781224.

The product of its digits is 13608, while the sum is 35.

The square root of 7123216319 is about 84399.1488049494. The cubic root of 7123216319 is about 1924.0899791765.

The spelling of 7123216319 in words is "seven billion, one hundred twenty-three million, two hundred sixteen thousand, three hundred nineteen".