7217242438 has 24 divisors (see below), whose sum is σ = 12629087352. Its totient is φ = 3084326784.

The previous prime is 7217242433. The next prime is 7217242447. The reversal of 7217242438 is 8342427127.

It is a self number, because there is not a number n which added to its sum of digits gives 7217242438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7217242433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69720 + ... + 138907.

It is an arithmetic number, because the mean of its divisors is an integer number (526211973).

Almost surely, 2^7217242438 is an apocalyptic number.

7217242438 is a deficient number, since it is larger than the sum of its proper divisors (5411844914).

7217242438 is a wasteful number, since it uses less digits than its factorization.

7217242438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208996 (or 208989 counting only the distinct ones).

The product of its digits is 150528, while the sum is 40.

The square root of 7217242438 is about 84954.3550266848. The cubic root of 7217242438 is about 1932.5189654652.

The spelling of 7217242438 in words is "seven billion, two hundred seventeen million, two hundred forty-two thousand, four hundred thirty-eight".