2155213430 has 16 divisors (see below), whose sum is σ = 3888228960. Its totient is φ = 860119872.

The previous prime is 2155213429. The next prime is 2155213433. The reversal of 2155213430 is 343125512.

It is a happy number.

2155213430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2155213430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155213433) 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, 241079 + ... + 249858.

It is an arithmetic number, because the mean of its divisors is an integer number (243014310).

Almost surely, 2^2155213430 is an apocalyptic number.

2155213430 is a deficient number, since it is larger than the sum of its proper divisors (1733015530).

2155213430 is a wasteful number, since it uses less digits than its factorization.

2155213430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491383.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2155213430 is about 46424.2763002290. The cubic root of 2155213430 is about 1291.7052603846.

Adding to 2155213430 its reverse (343125512), we get a palindrome (2498338942).

The spelling of 2155213430 in words is "two billion, one hundred fifty-five million, two hundred thirteen thousand, four hundred thirty".