213345301555 has 4 divisors (see below), whose sum is σ = 256014361872. Its totient is φ = 170676241240.

The previous prime is 213345301553. The next prime is 213345301567. The reversal of 213345301555 is 555103543312.

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

It is not a de Polignac number, because 213345301555 - 2¹ = 213345301553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213345301553) 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, 21334530151 + ... + 21334530160.

It is an arithmetic number, because the mean of its divisors is an integer number (64003590468).

Almost surely, 2^213345301555 is an apocalyptic number.

213345301555 is a deficient number, since it is larger than the sum of its proper divisors (42669060317).

213345301555 is an equidigital number, since it uses as much as digits as its factorization.

213345301555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42669060316.

The product of its (nonzero) digits is 135000, while the sum is 37.

Adding to 213345301555 its reverse (555103543312), we get a palindrome (768448844867).

The spelling of 213345301555 in words is "two hundred thirteen billion, three hundred forty-five million, three hundred one thousand, five hundred fifty-five".