213820525155 has 32 divisors (see below), whose sum is σ = 345573817344. Its totient is φ = 112885583616.

The previous prime is 213820525151. The next prime is 213820525223. The reversal of 213820525155 is 551525028312.

It is not a de Polignac number, because 213820525155 - 2² = 213820525151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213820525151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2079639 + ... + 2180031.

It is an arithmetic number, because the mean of its divisors is an integer number (10799181792).

Almost surely, 2^213820525155 is an apocalyptic number.

213820525155 is a deficient number, since it is larger than the sum of its proper divisors (131753292189).

213820525155 is a wasteful number, since it uses less digits than its factorization.

213820525155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101835.

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 213820525155 in words is "two hundred thirteen billion, eight hundred twenty million, five hundred twenty-five thousand, one hundred fifty-five".