2154520035523 has 4 divisors (see below), whose sum is σ = 2184865388208. Its totient is φ = 2124174682840.

The previous prime is 2154520035463. The next prime is 2154520035539. The reversal of 2154520035523 is 3255300254512.

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 2154520035523 - 2²¹ = 2154517938371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154520035223) 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, 15172676236 + ... + 15172676377.

It is an arithmetic number, because the mean of its divisors is an integer number (546216347052).

Almost surely, 2^{2154520035523} is an apocalyptic number.

2154520035523 is a deficient number, since it is larger than the sum of its proper divisors (30345352685).

2154520035523 is an equidigital number, since it uses as much as digits as its factorization.

2154520035523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30345352684.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 2154520035523 in words is "two trillion, one hundred fifty-four billion, five hundred twenty million, thirty-five thousand, five hundred twenty-three".