213125505 has 8 divisors (see below), whose sum is σ = 341000832. Its totient is φ = 113666928.

The previous prime is 213125443. The next prime is 213125519. The reversal of 213125505 is 505521312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213125505 - 2⁷ = 213125377 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7104169 + ... + 7104198.

It is an arithmetic number, because the mean of its divisors is an integer number (42625104).

Almost surely, 2^213125505 is an apocalyptic number.

It is an amenable number.

213125505 is a deficient number, since it is larger than the sum of its proper divisors (127875327).

213125505 is a wasteful number, since it uses less digits than its factorization.

213125505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14208375.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 213125505 is about 14598.8186165868. The cubic root of 213125505 is about 597.3265358980.

Adding to 213125505 its reverse (505521312), we get a palindrome (718646817).

The spelling of 213125505 in words is "two hundred thirteen million, one hundred twenty-five thousand, five hundred five".