213042537 has 12 divisors (see below), whose sum is σ = 321107904. Its totient is φ = 135853080.

The previous prime is 213042527. The next prime is 213042541. The reversal of 213042537 is 735240312.

213042537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213042537 - 2⁷ = 213042409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213042537.

It is not an unprimeable number, because it can be changed into a prime (213042517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514389 + ... + 514802.

It is an arithmetic number, because the mean of its divisors is an integer number (26758992).

Almost surely, 2^213042537 is an apocalyptic number.

It is an amenable number.

213042537 is a deficient number, since it is larger than the sum of its proper divisors (108065367).

213042537 is a wasteful number, since it uses less digits than its factorization.

213042537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029220 (or 1029217 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 213042537 is about 14595.9767401843. The cubic root of 213042537 is about 597.2490144075.

Adding to 213042537 its reverse (735240312), we get a palindrome (948282849).

The spelling of 213042537 in words is "two hundred thirteen million, forty-two thousand, five hundred thirty-seven".