2154213015 has 16 divisors (see below), whose sum is σ = 3505161600. Its totient is φ = 1129440032.

The previous prime is 2154213013. The next prime is 2154213023. The reversal of 2154213015 is 5103124512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2154213015 - 2¹ = 2154213013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154213013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216185 + ... + 1217954.

It is an arithmetic number, because the mean of its divisors is an integer number (219072600).

Almost surely, 2^2154213015 is an apocalyptic number.

2154213015 is a deficient number, since it is larger than the sum of its proper divisors (1350948585).

2154213015 is a wasteful number, since it uses less digits than its factorization.

2154213015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434206.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2154213015 is about 46413.5003528068. The cubic root of 2154213015 is about 1291.5053665988.

Adding to 2154213015 its reverse (5103124512), we get a palindrome (7257337527).

The spelling of 2154213015 in words is "two billion, one hundred fifty-four million, two hundred thirteen thousand, fifteen".