249966855 has 24 divisors (see below), whose sum is σ = 433687488. Its totient is φ = 133189056.

The previous prime is 249966851. The next prime is 249966859. The reversal of 249966855 is 558669942.

It is a happy number.

249966855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (249966851) and next prime (249966859).

It is not a de Polignac number, because 249966855 - 2² = 249966851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249966851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63474 + ... + 67296.

It is an arithmetic number, because the mean of its divisors is an integer number (18070312).

Almost surely, 2^249966855 is an apocalyptic number.

249966855 is a deficient number, since it is larger than the sum of its proper divisors (183720633).

249966855 is a wasteful number, since it uses less digits than its factorization.

249966855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 5284 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 249966855 is about 15810.3401291686. The cubic root of 249966855 is about 629.9326836615.

The spelling of 249966855 in words is "two hundred forty-nine million, nine hundred sixty-six thousand, eight hundred fifty-five".