7257887213 has 2 divisors, whose sum is σ = 7257887214. Its totient is φ = 7257887212.

The previous prime is 7257887191. The next prime is 7257887227. The reversal of 7257887213 is 3127887527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6965237764 + 292649449 = 83458^2 + 17107^2 .

It is a cyclic number.

It is not a de Polignac number, because 7257887213 - 2⁶ = 7257887149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7257887233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628943606 + 3628943607.

It is an arithmetic number, because the mean of its divisors is an integer number (3628943607).

Almost surely, 2^7257887213 is an apocalyptic number.

It is an amenable number.

7257887213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7257887213 is an equidigital number, since it uses as much as digits as its factorization.

7257887213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The square root of 7257887213 is about 85193.2345494641. The cubic root of 7257887213 is about 1936.1399148882.

The spelling of 7257887213 in words is "seven billion, two hundred fifty-seven million, eight hundred eighty-seven thousand, two hundred thirteen".