2154245523 has 4 divisors (see below), whose sum is σ = 2872327368. Its totient is φ = 1436163680.

The previous prime is 2154245497. The next prime is 2154245543. The reversal of 2154245523 is 3255424512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154245523 - 2²² = 2150051219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154245543) 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, 359040918 + ... + 359040923.

It is an arithmetic number, because the mean of its divisors is an integer number (718081842).

Almost surely, 2^2154245523 is an apocalyptic number.

2154245523 is a deficient number, since it is larger than the sum of its proper divisors (718081845).

2154245523 is an equidigital number, since it uses as much as digits as its factorization.

2154245523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718081844.

The product of its digits is 48000, while the sum is 33.

The square root of 2154245523 is about 46413.8505513171. The cubic root of 2154245523 is about 1291.5118630230.

The spelling of 2154245523 in words is "two billion, one hundred fifty-four million, two hundred forty-five thousand, five hundred twenty-three".