213554137 has 2 divisors, whose sum is σ = 213554138. Its totient is φ = 213554136.

The previous prime is 213554027. The next prime is 213554171. The reversal of 213554137 is 731455312.

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., 109432521 + 104121616 = 10461^2 + 10204^2 .

It is a cyclic number.

It is not a de Polignac number, because 213554137 - 2¹⁹ = 213029849 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213554099 and 213554108.

It is not a weakly prime, because it can be changed into another prime (213554837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106777068 + 106777069.

It is an arithmetic number, because the mean of its divisors is an integer number (106777069).

Almost surely, 2^213554137 is an apocalyptic number.

It is an amenable number.

213554137 is a deficient number, since it is larger than the sum of its proper divisors (1).

213554137 is an equidigital number, since it uses as much as digits as its factorization.

213554137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 213554137 is about 14613.4916087840. The cubic root of 213554137 is about 597.7267098345.

The spelling of 213554137 in words is "two hundred thirteen million, five hundred fifty-four thousand, one hundred thirty-seven".