213525011 has 4 divisors (see below), whose sum is σ = 244028592. Its totient is φ = 183021432.

The previous prime is 213525001. The next prime is 213525019. The reversal of 213525011 is 110525312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213525011 - 2¹⁰ = 213523987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213525019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15251780 + ... + 15251793.

It is an arithmetic number, because the mean of its divisors is an integer number (61007148).

Almost surely, 2^213525011 is an apocalyptic number.

213525011 is a deficient number, since it is larger than the sum of its proper divisors (30503581).

213525011 is an equidigital number, since it uses as much as digits as its factorization.

213525011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30503580.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 213525011 is about 14612.4950299393. The cubic root of 213525011 is about 597.6995345557.

The spelling of 213525011 in words is "two hundred thirteen million, five hundred twenty-five thousand, eleven".