2121554452 has 12 divisors (see below), whose sum is σ = 3713332896. Its totient is φ = 1060602200.

The previous prime is 2121554447. The next prime is 2121554453. The reversal of 2121554452 is 2544551212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121554453) 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, 14278 + ... + 66685.

It is an arithmetic number, because the mean of its divisors is an integer number (309444408).

Almost surely, 2^2121554452 is an apocalyptic number.

It is an amenable number.

2121554452 is a deficient number, since it is larger than the sum of its proper divisors (1591778444).

2121554452 is a wasteful number, since it uses less digits than its factorization.

2121554452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87518 (or 87516 counting only the distinct ones).

The product of its digits is 16000, while the sum is 31.

The square root of 2121554452 is about 46060.3349097681. The cubic root of 2121554452 is about 1284.9455587164.

The spelling of 2121554452 in words is "two billion, one hundred twenty-one million, five hundred fifty-four thousand, four hundred fifty-two".