3115154221 has 4 divisors (see below), whose sum is σ = 3187599712. Its totient is φ = 3042708732.

The previous prime is 3115154117. The next prime is 3115154227. The reversal of 3115154221 is 1224515113.

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 3115154221 - 2¹⁵ = 3115121453 is a prime.

It is a super-2 number, since 2×3115154221² = 19408371641228233682, which 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 (3115154227) 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, 36222681 + ... + 36222766.

It is an arithmetic number, because the mean of its divisors is an integer number (796899928).

Almost surely, 2^3115154221 is an apocalyptic number.

It is an amenable number.

3115154221 is a deficient number, since it is larger than the sum of its proper divisors (72445491).

3115154221 is an equidigital number, since it uses as much as digits as its factorization.

3115154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72445490.

The product of its digits is 1200, while the sum is 25.

The square root of 3115154221 is about 55813.5666393037. The cubic root of 3115154221 is about 1460.4718280184.

Adding to 3115154221 its reverse (1224515113), we get a palindrome (4339669334).

The spelling of 3115154221 in words is "three billion, one hundred fifteen million, one hundred fifty-four thousand, two hundred twenty-one".