2145211403 has 8 divisors (see below), whose sum is σ = 2315671200. Its totient is φ = 1981184128.

The previous prime is 2145211381. The next prime is 2145211423. The reversal of 2145211403 is 3041125412.

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 2145211403 - 2¹² = 2145207307 is a prime.

It is a super-2 number, since 2×2145211403² = 9203863927122456818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145211423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607438 + ... + 1608771.

It is an arithmetic number, because the mean of its divisors is an integer number (289458900).

Almost surely, 2^2145211403 is an apocalyptic number.

2145211403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2145211403 is a deficient number, since it is larger than the sum of its proper divisors (170459797).

2145211403 is a wasteful number, since it uses less digits than its factorization.

2145211403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216261.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2145211403 is about 46316.4269239327. The cubic root of 2145211403 is about 1289.7039568642.

Adding to 2145211403 its reverse (3041125412), we get a palindrome (5186336815).

The spelling of 2145211403 in words is "two billion, one hundred forty-five million, two hundred eleven thousand, four hundred three".