21514451310243 has 10 divisors (see below), whose sum is σ = 32138871710484. Its totient is φ = 14342967540108.

The previous prime is 21514451310239. The next prime is 21514451310299. The reversal of 21514451310243 is 34201315441512.

21514451310243 is a `hidden beast` number, since 2 + 1 + 51 + 4 + 4 + 51 + 310 + 243 = 666.

It is not a de Polignac number, because 21514451310243 - 2² = 21514451310239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21514451310198 and 21514451310207.

It is not an unprimeable number, because it can be changed into a prime (21514451310943) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 132805254921 + ... + 132805255082.

Almost surely, 2^{21514451310243} is an apocalyptic number.

21514451310243 is a deficient number, since it is larger than the sum of its proper divisors (10624420400241).

21514451310243 is an equidigital number, since it uses as much as digits as its factorization.

21514451310243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265610510015 (or 265610510006 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 21514451310243 its reverse (34201315441512), we get a palindrome (55715766751755).

The spelling of 21514451310243 in words is "twenty-one trillion, five hundred fourteen billion, four hundred fifty-one million, three hundred ten thousand, two hundred forty-three".