214521401 has 2 divisors, whose sum is σ = 214521402. Its totient is φ = 214521400.

The previous prime is 214521397. The next prime is 214521407. The reversal of 214521401 is 104125412.

It is a happy number.

214521401 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 can be written as a sum of positive squares in only one way, i.e., 158256400 + 56265001 = 12580^2 + 7501^2 .

It is a cyclic number.

It is not a de Polignac number, because 214521401 - 2² = 214521397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214521407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107260700 + 107260701.

It is an arithmetic number, because the mean of its divisors is an integer number (107260701).

Almost surely, 2^214521401 is an apocalyptic number.

It is an amenable number.

214521401 is a deficient number, since it is larger than the sum of its proper divisors (1).

214521401 is an equidigital number, since it uses as much as digits as its factorization.

214521401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 214521401 is about 14646.5491157474. The cubic root of 214521401 is about 598.6277909816.

Adding to 214521401 its reverse (104125412), we get a palindrome (318646813).

The spelling of 214521401 in words is "two hundred fourteen million, five hundred twenty-one thousand, four hundred one".