2154144523 has 16 divisors (see below), whose sum is σ = 2247598080. Its totient is φ = 2062317600.

The previous prime is 2154144491. The next prime is 2154144541. The reversal of 2154144523 is 3254414512.

It is a cyclic number.

It is not a de Polignac number, because 2154144523 - 2⁵ = 2154144491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154144823) 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, 1236433 + ... + 1238173.

It is an arithmetic number, because the mean of its divisors is an integer number (140474880).

Almost surely, 2^2154144523 is an apocalyptic number.

2154144523 is a deficient number, since it is larger than the sum of its proper divisors (93453557).

2154144523 is a wasteful number, since it uses less digits than its factorization.

2154144523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178.

The product of its digits is 19200, while the sum is 31.

The square root of 2154144523 is about 46412.7625012776. The cubic root of 2154144523 is about 1291.4916788897.

The spelling of 2154144523 in words is "two billion, one hundred fifty-four million, one hundred forty-four thousand, five hundred twenty-three".