248229991 has 2 divisors, whose sum is σ = 248229992. Its totient is φ = 248229990.

The previous prime is 248229979. The next prime is 248230043. The reversal of 248229991 is 199922842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248229991 - 2⁵ = 248229959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248229901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124114995 + 124114996.

It is an arithmetic number, because the mean of its divisors is an integer number (124114996).

Almost surely, 2^248229991 is an apocalyptic number.

248229991 is a deficient number, since it is larger than the sum of its proper divisors (1).

248229991 is an equidigital number, since it uses as much as digits as its factorization.

248229991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 248229991 is about 15755.3162773713. The cubic root of 248229991 is about 628.4702880189.

The spelling of 248229991 in words is "two hundred forty-eight million, two hundred twenty-nine thousand, nine hundred ninety-one".