213004351555 has 24 divisors (see below), whose sum is σ = 271484793072. Its totient is φ = 160406415936.

The previous prime is 213004351543. The next prime is 213004351559. The reversal of 213004351555 is 555153400312.

It is not a de Polignac number, because 213004351555 - 2²¹ = 213002254403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213004351555.

It is not an unprimeable number, because it can be changed into a prime (213004351559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92437 + ... + 659206.

It is an arithmetic number, because the mean of its divisors is an integer number (11311866378).

Almost surely, 2^213004351555 is an apocalyptic number.

213004351555 is a deficient number, since it is larger than the sum of its proper divisors (58480441517).

213004351555 is a wasteful number, since it uses less digits than its factorization.

213004351555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751843 (or 751824 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 213004351555 its reverse (555153400312), we get a palindrome (768157751867).

The spelling of 213004351555 in words is "two hundred thirteen billion, four million, three hundred fifty-one thousand, five hundred fifty-five".