214571661 has 8 divisors (see below), whose sum is σ = 286376640. Its totient is φ = 142907232.

The previous prime is 214571653. The next prime is 214571717. The reversal of 214571661 is 166175412.

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

It is not a de Polignac number, because 214571661 - 2³ = 214571653 is a prime.

It is a super-3 number, since 3×214571661³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214571611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31521 + ... + 37718.

It is an arithmetic number, because the mean of its divisors is an integer number (35797080).

Almost surely, 2^214571661 is an apocalyptic number.

It is an amenable number.

214571661 is a deficient number, since it is larger than the sum of its proper divisors (71804979).

214571661 is a wasteful number, since it uses less digits than its factorization.

214571661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70275.

The product of its digits is 10080, while the sum is 33.

The square root of 214571661 is about 14648.2647777817. The cubic root of 214571661 is about 598.6745379623.

The spelling of 214571661 in words is "two hundred fourteen million, five hundred seventy-one thousand, six hundred sixty-one".