213405125 has 16 divisors (see below), whose sum is σ = 267950592. Its totient is φ = 169685200.

The previous prime is 213405121. The next prime is 213405161. The reversal of 213405125 is 521504312.

213405125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213405125 - 2² = 213405121 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 213405125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213405121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15764 + ... + 25986.

It is an arithmetic number, because the mean of its divisors is an integer number (16746912).

Almost surely, 2^213405125 is an apocalyptic number.

213405125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213405125 is a deficient number, since it is larger than the sum of its proper divisors (54545467).

213405125 is a wasteful number, since it uses less digits than its factorization.

213405125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405 (or 10395 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 213405125 is about 14608.3922797822. The cubic root of 213405125 is about 597.5876519228.

Adding to 213405125 its reverse (521504312), we get a palindrome (734909437).

The spelling of 213405125 in words is "two hundred thirteen million, four hundred five thousand, one hundred twenty-five".