7216863421 has 4 divisors (see below), whose sum is σ = 7339183200. Its totient is φ = 7094543644.

The previous prime is 7216863413. The next prime is 7216863449. The reversal of 7216863421 is 1243686127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7216863421 - 2³ = 7216863413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216866421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61159801 + ... + 61159918.

It is an arithmetic number, because the mean of its divisors is an integer number (1834795800).

Almost surely, 2^7216863421 is an apocalyptic number.

It is an amenable number.

7216863421 is a deficient number, since it is larger than the sum of its proper divisors (122319779).

7216863421 is a wasteful number, since it uses less digits than its factorization.

7216863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122319778.

The product of its digits is 96768, while the sum is 40.

The square root of 7216863421 is about 84952.1242877422. The cubic root of 7216863421 is about 1932.4851358149.

The spelling of 7216863421 in words is "seven billion, two hundred sixteen million, eight hundred sixty-three thousand, four hundred twenty-one".