2154243453 has 16 divisors (see below), whose sum is σ = 2973017280. Its totient is φ = 1385870976.

The previous prime is 2154243407. The next prime is 2154243461. The reversal of 2154243453 is 3543424512.

It is not a de Polignac number, because 2154243453 - 2¹² = 2154239357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154243493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180126 + ... + 191712.

It is an arithmetic number, because the mean of its divisors is an integer number (185813580).

Almost surely, 2^2154243453 is an apocalyptic number.

It is an amenable number.

2154243453 is a deficient number, since it is larger than the sum of its proper divisors (818773827).

2154243453 is a wasteful number, since it uses less digits than its factorization.

2154243453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756.

The product of its digits is 57600, while the sum is 33.

The square root of 2154243453 is about 46413.8282519337. The cubic root of 2154243453 is about 1291.5114493546.

Adding to 2154243453 its reverse (3543424512), we get a palindrome (5697667965).

The spelling of 2154243453 in words is "two billion, one hundred fifty-four million, two hundred forty-three thousand, four hundred fifty-three".