213957701 has 2 divisors, whose sum is σ = 213957702. Its totient is φ = 213957700.

The previous prime is 213957619. The next prime is 213957739. The reversal of 213957701 is 107759312.

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., 198077476 + 15880225 = 14074^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 213957701 - 2¹⁸ = 213695557 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 (213957901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106978850 + 106978851.

It is an arithmetic number, because the mean of its divisors is an integer number (106978851).

Almost surely, 2^213957701 is an apocalyptic number.

It is an amenable number.

213957701 is a deficient number, since it is larger than the sum of its proper divisors (1).

213957701 is an equidigital number, since it uses as much as digits as its factorization.

213957701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 213957701 is about 14627.2930168230. The cubic root of 213957701 is about 598.1029909897.

The spelling of 213957701 in words is "two hundred thirteen million, nine hundred fifty-seven thousand, seven hundred one".