213503641 has 16 divisors (see below), whose sum is σ = 242161920. Its totient is φ = 186753600.

The previous prime is 213503617. The next prime is 213503659. The reversal of 213503641 is 146305312.

It is a cyclic number.

It is not a de Polignac number, because 213503641 - 2¹³ = 213495449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213503681) 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, 29316 + ... + 35866.

It is an arithmetic number, because the mean of its divisors is an integer number (15135120).

Almost surely, 2^213503641 is an apocalyptic number.

It is an amenable number.

213503641 is a deficient number, since it is larger than the sum of its proper divisors (28658279).

213503641 is a wasteful number, since it uses less digits than its factorization.

213503641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 213503641 is about 14611.7637881263. The cubic root of 213503641 is about 597.6795942450.

Adding to 213503641 its reverse (146305312), we get a palindrome (359808953).

The spelling of 213503641 in words is "two hundred thirteen million, five hundred three thousand, six hundred forty-one".