213454303145 has 4 divisors (see below), whose sum is σ = 256145163780. Its totient is φ = 170763442512.

The previous prime is 213454303129. The next prime is 213454303189. The reversal of 213454303145 is 541303454312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43594099264 + 169860203881 = 208792^2 + 412141^2 .

It is a cyclic number.

It is not a de Polignac number, because 213454303145 - 2⁴ = 213454303129 is a prime.

It is a super-2 number, since 2×213454303145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21345430310 + ... + 21345430319.

It is an arithmetic number, because the mean of its divisors is an integer number (64036290945).

Almost surely, 2^213454303145 is an apocalyptic number.

It is an amenable number.

213454303145 is a deficient number, since it is larger than the sum of its proper divisors (42690860635).

213454303145 is an equidigital number, since it uses as much as digits as its factorization.

213454303145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42690860634.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 213454303145 its reverse (541303454312), we get a palindrome (754757757457).

The spelling of 213454303145 in words is "two hundred thirteen billion, four hundred fifty-four million, three hundred three thousand, one hundred forty-five".