213625541 has 6 divisors (see below), whose sum is σ = 223317990. Its totient is φ = 204336968.

The previous prime is 213625537. The next prime is 213625549. The reversal of 213625541 is 145526312.

It can be written as a sum of positive squares in only one way, i.e., 189172516 + 24453025 = 13754^2 + 4945^2 .

It is not a de Polignac number, because 213625541 - 2² = 213625537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213625549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201386 + ... + 202443.

It is an arithmetic number, because the mean of its divisors is an integer number (37219665).

Almost surely, 2^213625541 is an apocalyptic number.

It is an amenable number.

213625541 is a deficient number, since it is larger than the sum of its proper divisors (9692449).

213625541 is an equidigital number, since it uses as much as digits as its factorization.

213625541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403875 (or 403852 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 213625541 is about 14615.9344894536. The cubic root of 213625541 is about 597.7933210814.

The spelling of 213625541 in words is "two hundred thirteen million, six hundred twenty-five thousand, five hundred forty-one".