213008501 has 2 divisors, whose sum is σ = 213008502. Its totient is φ = 213008500.

The previous prime is 213008491. The next prime is 213008527. The reversal of 213008501 is 105800312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211731601 + 1276900 = 14551^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 213008501 - 2²² = 208814197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213008531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106504250 + 106504251.

It is an arithmetic number, because the mean of its divisors is an integer number (106504251).

Almost surely, 2^213008501 is an apocalyptic number.

It is an amenable number.

213008501 is a deficient number, since it is larger than the sum of its proper divisors (1).

213008501 is an equidigital number, since it uses as much as digits as its factorization.

213008501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 213008501 is about 14594.8107558817. The cubic root of 213008501 is about 597.2172069097.

Adding to 213008501 its reverse (105800312), we get a palindrome (318808813).

The spelling of 213008501 in words is "two hundred thirteen million, eight thousand, five hundred one".