214521491 has 2 divisors, whose sum is σ = 214521492. Its totient is φ = 214521490.

The previous prime is 214521481. The next prime is 214521563. The reversal of 214521491 is 194125412.

214521491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214521491 - 2⁶ = 214521427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214521401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107260745 + 107260746.

It is an arithmetic number, because the mean of its divisors is an integer number (107260746).

Almost surely, 2^214521491 is an apocalyptic number.

214521491 is a deficient number, since it is larger than the sum of its proper divisors (1).

214521491 is an equidigital number, since it uses as much as digits as its factorization.

214521491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 214521491 is about 14646.5521881431. The cubic root of 214521491 is about 598.6278746974.

The spelling of 214521491 in words is "two hundred fourteen million, five hundred twenty-one thousand, four hundred ninety-one".