2154403212 has 72 divisors (see below), whose sum is σ = 5455399824. Its totient is φ = 661430016.

The previous prime is 2154403211. The next prime is 2154403213. The reversal of 2154403212 is 2123044512.

It is an interprime number because it is at equal distance from previous prime (2154403211) and next prime (2154403213).

It is not an unprimeable number, because it can be changed into a prime (2154403211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1242298 + ... + 1244030.

It is an arithmetic number, because the mean of its divisors is an integer number (75769442).

Almost surely, 2^2154403212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154403212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2727699912).

2154403212 is an abundant number, since it is smaller than the sum of its proper divisors (3300996612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154403212 is a wasteful number, since it uses less digits than its factorization.

2154403212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2154403212 is about 46415.5492480699. The cubic root of 2154403212 is about 1291.5433747895.

Adding to 2154403212 its reverse (2123044512), we get a palindrome (4277447724).

The spelling of 2154403212 in words is "two billion, one hundred fifty-four million, four hundred three thousand, two hundred twelve".