213015553 has 2 divisors, whose sum is σ = 213015554. Its totient is φ = 213015552.

The previous prime is 213015529. The next prime is 213015577. The reversal of 213015553 is 355510312.

It is a balanced prime because it is at equal distance from previous prime (213015529) and next prime (213015577).

It can be written as a sum of positive squares in only one way, i.e., 186513649 + 26501904 = 13657^2 + 5148^2 .

It is a cyclic number.

It is not a de Polignac number, because 213015553 - 2⁹ = 213015041 is a prime.

It is not a weakly prime, because it can be changed into another prime (213015503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106507776 + 106507777.

It is an arithmetic number, because the mean of its divisors is an integer number (106507777).

Almost surely, 2^213015553 is an apocalyptic number.

It is an amenable number.

213015553 is a deficient number, since it is larger than the sum of its proper divisors (1).

213015553 is an equidigital number, since it uses as much as digits as its factorization.

213015553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 213015553 is about 14595.0523466002. The cubic root of 213015553 is about 597.2237974593.

Adding to 213015553 its reverse (355510312), we get a palindrome (568525865).

The spelling of 213015553 in words is "two hundred thirteen million, fifteen thousand, five hundred fifty-three".