213437801 has 2 divisors, whose sum is σ = 213437802. Its totient is φ = 213437800.

The previous prime is 213437797. The next prime is 213437803. The reversal of 213437801 is 108734312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123187801 + 90250000 = 11099^2 + 9500^2 .

It is a cyclic number.

It is not a de Polignac number, because 213437801 - 2² = 213437797 is a prime.

Together with 213437803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213437803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106718900 + 106718901.

It is an arithmetic number, because the mean of its divisors is an integer number (106718901).

Almost surely, 2^213437801 is an apocalyptic number.

It is an amenable number.

213437801 is a deficient number, since it is larger than the sum of its proper divisors (1).

213437801 is an equidigital number, since it uses as much as digits as its factorization.

213437801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 213437801 is about 14609.5106351993. The cubic root of 213437801 is about 597.6181506867.

The spelling of 213437801 in words is "two hundred thirteen million, four hundred thirty-seven thousand, eight hundred one".