2155213432 has 16 divisors (see below), whose sum is σ = 4047848640. Its totient is φ = 1075787136.

The previous prime is 2155213429. The next prime is 2155213433. The reversal of 2155213432 is 2343125512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155213432.

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 3 ways as a sum of consecutive naturals, for example, 222408 + ... + 231895.

It is an arithmetic number, because the mean of its divisors is an integer number (252990540).

Almost surely, 2^2155213432 is an apocalyptic number.

It is an amenable number.

2155213432 is a deficient number, since it is larger than the sum of its proper divisors (1892635208).

2155213432 is a wasteful number, since it uses less digits than its factorization.

2155213432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454902 (or 454898 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 2155213432 is about 46424.2763217694. The cubic root of 2155213432 is about 1291.7052607842.

Adding to 2155213432 its reverse (2343125512), we get a palindrome (4498338944).

The spelling of 2155213432 in words is "two billion, one hundred fifty-five million, two hundred thirteen thousand, four hundred thirty-two".