213601457 has 2 divisors, whose sum is σ = 213601458. Its totient is φ = 213601456.

The previous prime is 213601411. The next prime is 213601463. The reversal of 213601457 is 754106312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192404641 + 21196816 = 13871^2 + 4604^2 .

It is a cyclic number.

It is not a de Polignac number, because 213601457 - 2¹² = 213597361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213601357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106800728 + 106800729.

It is an arithmetic number, because the mean of its divisors is an integer number (106800729).

Almost surely, 2^213601457 is an apocalyptic number.

It is an amenable number.

213601457 is a deficient number, since it is larger than the sum of its proper divisors (1).

213601457 is an equidigital number, since it uses as much as digits as its factorization.

213601457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 213601457 is about 14615.1105709126. The cubic root of 213601457 is about 597.7708552980.

Adding to 213601457 its reverse (754106312), we get a palindrome (967707769).

The spelling of 213601457 in words is "two hundred thirteen million, six hundred one thousand, four hundred fifty-seven".