249653481 has 48 divisors (see below), whose sum is σ = 425251008. Its totient is φ = 128822400.

The previous prime is 249653473. The next prime is 249653501. The reversal of 249653481 is 184356942.

It is not a de Polignac number, because 249653481 - 2³ = 249653473 is a prime.

It is a super-2 number, since 2×249653481² = 124653721150834722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (249653441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292251 + ... + 293103.

It is an arithmetic number, because the mean of its divisors is an integer number (8859396).

Almost surely, 2^249653481 is an apocalyptic number.

249653481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

249653481 is a deficient number, since it is larger than the sum of its proper divisors (175597527).

249653481 is a wasteful number, since it uses less digits than its factorization.

249653481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1055 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 249653481 is about 15800.4266081647. The cubic root of 249653481 is about 629.6693326462.

The spelling of 249653481 in words is "two hundred forty-nine million, six hundred fifty-three thousand, four hundred eighty-one".