4138221497 has 8 divisors (see below), whose sum is σ = 4288355400. Its totient is φ = 3988583424.

The previous prime is 4138221463. The next prime is 4138221523. The reversal of 4138221497 is 7941228314.

It can be written as a sum of positive squares in 4 ways, for example, as 1660073536 + 2478147961 = 40744^2 + 49781^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4138221497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4138221407) 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, 106922 + ... + 140387.

It is an arithmetic number, because the mean of its divisors is an integer number (536044425).

Almost surely, 2^4138221497 is an apocalyptic number.

It is an amenable number.

4138221497 is a deficient number, since it is larger than the sum of its proper divisors (150133903).

4138221497 is a wasteful number, since it uses less digits than its factorization.

4138221497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247915.

The product of its digits is 96768, while the sum is 41.

The square root of 4138221497 is about 64329.0097623149. The cubic root of 4138221497 is about 1605.4788085021.

The spelling of 4138221497 in words is "four billion, one hundred thirty-eight million, two hundred twenty-one thousand, four hundred ninety-seven".