245733981 has 8 divisors (see below), whose sum is σ = 330545280. Its totient is φ = 162372672.

The previous prime is 245733979. The next prime is 245733989. The reversal of 245733981 is 189337542.

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

It is not a de Polignac number, because 245733981 - 2¹ = 245733979 is a prime.

It is a super-2 number, since 2×245733981² = 120770378836216722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245733989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362101 + ... + 362778.

It is an arithmetic number, because the mean of its divisors is an integer number (41318160).

Almost surely, 2^245733981 is an apocalyptic number.

It is an amenable number.

245733981 is a deficient number, since it is larger than the sum of its proper divisors (84811299).

245733981 is a wasteful number, since it uses less digits than its factorization.

245733981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724995.

The product of its digits is 181440, while the sum is 42.

The square root of 245733981 is about 15675.9044715130. The cubic root of 245733981 is about 626.3567165679.

The spelling of 245733981 in words is "two hundred forty-five million, seven hundred thirty-three thousand, nine hundred eighty-one".