2155241213 has 8 divisors (see below), whose sum is σ = 2175572256. Its totient is φ = 2134969200.

The previous prime is 2155241201. The next prime is 2155241233. The reversal of 2155241213 is 3121425512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155241213 - 2⁸ = 2155240957 is a prime.

It is a super-2 number, since 2×2155241213² = 9290129372427422738, 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 (2155241233) 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, 60395 + ... + 89207.

It is an arithmetic number, because the mean of its divisors is an integer number (271946532).

Almost surely, 2^2155241213 is an apocalyptic number.

It is an amenable number.

2155241213 is a deficient number, since it is larger than the sum of its proper divisors (20331043).

2155241213 is a wasteful number, since it uses less digits than its factorization.

2155241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29515.

The product of its digits is 2400, while the sum is 26.

The square root of 2155241213 is about 46424.5755284849. The cubic root of 2155241213 is about 1291.7108108470.

Adding to 2155241213 its reverse (3121425512), we get a palindrome (5276666725).

The spelling of 2155241213 in words is "two billion, one hundred fifty-five million, two hundred forty-one thousand, two hundred thirteen".