214821487 has 2 divisors, whose sum is σ = 214821488. Its totient is φ = 214821486.

The previous prime is 214821457. The next prime is 214821491. The reversal of 214821487 is 784128412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 214821487 - 2⁷ = 214821359 is a prime.

It is a super-2 number, since 2×214821487² = 92296542553782338, which contains 22 as substring.

It is equal to p_11852884 and since 214821487 and 11852884 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214821457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107410743 + 107410744.

It is an arithmetic number, because the mean of its divisors is an integer number (107410744).

Almost surely, 2^214821487 is an apocalyptic number.

214821487 is a deficient number, since it is larger than the sum of its proper divisors (1).

214821487 is an equidigital number, since it uses as much as digits as its factorization.

214821487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28672, while the sum is 37.

The square root of 214821487 is about 14656.7897917655. The cubic root of 214821487 is about 598.9067936354.

Adding to 214821487 its reverse (784128412), we get a palindrome (998949899).

The spelling of 214821487 in words is "two hundred fourteen million, eight hundred twenty-one thousand, four hundred eighty-seven".