215048749 has 2 divisors, whose sum is σ = 215048750. Its totient is φ = 215048748.

The previous prime is 215048723. The next prime is 215048777. The reversal of 215048749 is 947840512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136726249 + 78322500 = 11693^2 + 8850^2 .

It is a cyclic number.

It is not a de Polignac number, because 215048749 - 2⁷ = 215048621 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 (215048789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107524374 + 107524375.

It is an arithmetic number, because the mean of its divisors is an integer number (107524375).

Almost surely, 2^215048749 is an apocalyptic number.

It is an amenable number.

215048749 is a deficient number, since it is larger than the sum of its proper divisors (1).

215048749 is an equidigital number, since it uses as much as digits as its factorization.

215048749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 215048749 is about 14664.5405314998. The cubic root of 215048749 is about 599.1179158852.

The spelling of 215048749 in words is "two hundred fifteen million, forty-eight thousand, seven hundred forty-nine".