214151661 has 16 divisors (see below), whose sum is σ = 318864000. Its totient is φ = 142046784.

The previous prime is 214151657. The next prime is 214151677. The reversal of 214151661 is 166151412.

214151661 is a `hidden beast` number, since 2 + 141 + 516 + 6 + 1 = 666.

It is not a de Polignac number, because 214151661 - 2² = 214151657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214151681) 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, 14556 + ... + 25301.

It is an arithmetic number, because the mean of its divisors is an integer number (19929000).

Almost surely, 2^214151661 is an apocalyptic number.

It is an amenable number.

214151661 is a deficient number, since it is larger than the sum of its proper divisors (104712339).

214151661 is a wasteful number, since it uses less digits than its factorization.

214151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40065 (or 40059 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 214151661 is about 14633.9215865058. The cubic root of 214151661 is about 598.2836700338.

The spelling of 214151661 in words is "two hundred fourteen million, one hundred fifty-one thousand, six hundred sixty-one".