213053557 has 2 divisors, whose sum is σ = 213053558. Its totient is φ = 213053556.

The previous prime is 213053527. The next prime is 213053563. The reversal of 213053557 is 755350312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202037796 + 11015761 = 14214^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 213053557 - 2⁷ = 213053429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213053527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106526778 + 106526779.

It is an arithmetic number, because the mean of its divisors is an integer number (106526779).

Almost surely, 2^213053557 is an apocalyptic number.

It is an amenable number.

213053557 is a deficient number, since it is larger than the sum of its proper divisors (1).

213053557 is an equidigital number, since it uses as much as digits as its factorization.

213053557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 213053557 is about 14596.3542365894. The cubic root of 213053557 is about 597.2593121486.

The spelling of 213053557 in words is "two hundred thirteen million, fifty-three thousand, five hundred fifty-seven".