214661421 has 20 divisors (see below), whose sum is σ = 345335452. Its totient is φ = 132098688.

The previous prime is 214661413. The next prime is 214661437. The reversal of 214661421 is 124166412.

214661421 is a `hidden beast` number, since 2 + 1 + 46 + 614 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19053225 + 195608196 = 4365^2 + 13986^2 .

It is not a de Polignac number, because 214661421 - 2³ = 214661413 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214661401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 100876 + ... + 102981.

Almost surely, 2^214661421 is an apocalyptic number.

It is an amenable number.

214661421 is a deficient number, since it is larger than the sum of its proper divisors (130674031).

214661421 is a wasteful number, since it uses less digits than its factorization.

214661421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203882 (or 203873 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 214661421 is about 14651.3283015568. The cubic root of 214661421 is about 598.7580058582.

The spelling of 214661421 in words is "two hundred fourteen million, six hundred sixty-one thousand, four hundred twenty-one".