213520001 has 2 divisors, whose sum is σ = 213520002. Its totient is φ = 213520000.

The previous prime is 213519931. The next prime is 213520019. The reversal of 213520001 is 100025312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172239376 + 41280625 = 13124^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 213520001 - 2¹⁴ = 213503617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213520061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106760000 + 106760001.

It is an arithmetic number, because the mean of its divisors is an integer number (106760001).

Almost surely, 2^213520001 is an apocalyptic number.

It is an amenable number.

213520001 is a deficient number, since it is larger than the sum of its proper divisors (1).

213520001 is an equidigital number, since it uses as much as digits as its factorization.

213520001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 213520001 is about 14612.3236003040. The cubic root of 213520001 is about 597.6948598526.

Adding to 213520001 its reverse (100025312), we get a palindrome (313545313).

The spelling of 213520001 in words is "two hundred thirteen million, five hundred twenty thousand, one".