213805897125 has 16 divisors (see below), whose sum is σ = 355773013440. Its totient is φ = 114029811600.

The previous prime is 213805897117. The next prime is 213805897153. The reversal of 213805897125 is 521798508312.

It is not a de Polignac number, because 213805897125 - 2³ = 213805897117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285074155 + ... + 285074904.

It is an arithmetic number, because the mean of its divisors is an integer number (22235813340).

Almost surely, 2^213805897125 is an apocalyptic number.

213805897125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213805897125 is a deficient number, since it is larger than the sum of its proper divisors (141967116315).

213805897125 is an equidigital number, since it uses as much as digits as its factorization.

213805897125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570149077 (or 570149067 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 213805897125 in words is "two hundred thirteen billion, eight hundred five million, eight hundred ninety-seven thousand, one hundred twenty-five".