213485561 has 8 divisors (see below), whose sum is σ = 221856000. Its totient is φ = 205207920.

The previous prime is 213485549. The next prime is 213485621. The reversal of 213485561 is 165584312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213485561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213485521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18491 + ... + 27728.

It is an arithmetic number, because the mean of its divisors is an integer number (27732000).

Almost surely, 2^213485561 is an apocalyptic number.

It is an amenable number.

213485561 is a deficient number, since it is larger than the sum of its proper divisors (8370439).

213485561 is a wasteful number, since it uses less digits than its factorization.

213485561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46399.

The product of its digits is 28800, while the sum is 35.

The square root of 213485561 is about 14611.1450954400. The cubic root of 213485561 is about 597.6627227886.

The spelling of 213485561 in words is "two hundred thirteen million, four hundred eighty-five thousand, five hundred sixty-one".