249220471 has 8 divisors (see below), whose sum is σ = 251099280. Its totient is φ = 247348992.

The previous prime is 249220457. The next prime is 249220481. The reversal of 249220471 is 174022942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249220471 - 2¹⁹ = 248696183 is a prime.

It is a super-3 number, since 3×249220471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79296 + ... + 82378.

It is an arithmetic number, because the mean of its divisors is an integer number (31387410).

Almost surely, 2^249220471 is an apocalyptic number.

249220471 is a deficient number, since it is larger than the sum of its proper divisors (1878809).

249220471 is a wasteful number, since it uses less digits than its factorization.

249220471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 249220471 is about 15786.7181833337. The cubic root of 249220471 is about 629.3050798927.

The spelling of 249220471 in words is "two hundred forty-nine million, two hundred twenty thousand, four hundred seventy-one".