213605537 has 8 divisors (see below), whose sum is σ = 214885440. Its totient is φ = 212330160.

The previous prime is 213605507. The next prime is 213605549. The reversal of 213605537 is 735506312.

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

It is a cyclic number.

It is not a de Polignac number, because 213605537 - 2¹⁰ = 213604513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213605507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140612 + ... + 142122.

It is an arithmetic number, because the mean of its divisors is an integer number (26860680).

Almost surely, 2^213605537 is an apocalyptic number.

It is an amenable number.

213605537 is a deficient number, since it is larger than the sum of its proper divisors (1279903).

213605537 is a wasteful number, since it uses less digits than its factorization.

213605537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 213605537 is about 14615.2501518106. The cubic root of 213605537 is about 597.7746612795.

The spelling of 213605537 in words is "two hundred thirteen million, six hundred five thousand, five hundred thirty-seven".