213654973547 has 4 divisors (see below), whose sum is σ = 218200824096. Its totient is φ = 209109123000.

The previous prime is 213654973541. The next prime is 213654973577. The reversal of 213654973547 is 745379456312.

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 213654973547 - 2²⁰ = 213653924971 is a prime.

It is a super-2 number, since 2×213654973547² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213654973492 and 213654973501.

It is not an unprimeable number, because it can be changed into a prime (213654973541) 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, 2272925204 + ... + 2272925297.

It is an arithmetic number, because the mean of its divisors is an integer number (54550206024).

Almost surely, 2^213654973547 is an apocalyptic number.

213654973547 is a deficient number, since it is larger than the sum of its proper divisors (4545850549).

213654973547 is an equidigital number, since it uses as much as digits as its factorization.

213654973547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545850548.

The product of its digits is 19051200, while the sum is 56.

The spelling of 213654973547 in words is "two hundred thirteen billion, six hundred fifty-four million, nine hundred seventy-three thousand, five hundred forty-seven".