7494219221 has 4 divisors (see below), whose sum is σ = 7494418272. Its totient is φ = 7494020172.

The previous prime is 7494219203. The next prime is 7494219247. The reversal of 7494219221 is 1229124947.

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 a de Polignac number, because none of the positive numbers 2^k-7494219221 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 (7494219251) 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, 23891 + ... + 124736.

It is an arithmetic number, because the mean of its divisors is an integer number (1873604568).

Almost surely, 2^7494219221 is an apocalyptic number.

It is an amenable number.

7494219221 is a deficient number, since it is larger than the sum of its proper divisors (199051).

7494219221 is a wasteful number, since it uses less digits than its factorization.

7494219221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199050.

The product of its digits is 72576, while the sum is 41.

The square root of 7494219221 is about 86569.1586016637. The cubic root of 7494219221 is about 1956.9307805495.

The spelling of 7494219221 in words is "seven billion, four hundred ninety-four million, two hundred nineteen thousand, two hundred twenty-one".