2154535215043 has 4 divisors (see below), whose sum is σ = 2195186822928. Its totient is φ = 2113883607160.

The previous prime is 2154535215029. The next prime is 2154535215089. The reversal of 2154535215043 is 3405125354512.

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 2154535215043 - 2²⁵ = 2154501660611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154535214987 and 2154535215005.

It is not an unprimeable number, because it can be changed into a prime (2154535255043) 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, 20325803863 + ... + 20325803968.

It is an arithmetic number, because the mean of its divisors is an integer number (548796705732).

Almost surely, 2^{2154535215043} is an apocalyptic number.

2154535215043 is a deficient number, since it is larger than the sum of its proper divisors (40651607885).

2154535215043 is an equidigital number, since it uses as much as digits as its factorization.

2154535215043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40651607884.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 2154535215043 in words is "two trillion, one hundred fifty-four billion, five hundred thirty-five million, two hundred fifteen thousand, forty-three".