213503125 has 24 divisors (see below), whose sum is σ = 291168864. Its totient is φ = 155250000.

The previous prime is 213503117. The next prime is 213503131. The reversal of 213503125 is 521305312.

It is not a de Polignac number, because 213503125 - 2³ = 213503117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213503096 and 213503105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31270 + ... + 37480.

It is an arithmetic number, because the mean of its divisors is an integer number (12132036).

Almost surely, 2^213503125 is an apocalyptic number.

213503125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213503125 is a deficient number, since it is larger than the sum of its proper divisors (77665739).

213503125 is an frugal number, since it uses more digits than its factorization.

213503125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247 (or 6227 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 213503125 is about 14611.7461311097. The cubic root of 213503125 is about 597.6791127498.

Adding to 213503125 its reverse (521305312), we get a palindrome (734808437).

The spelling of 213503125 in words is "two hundred thirteen million, five hundred three thousand, one hundred twenty-five".