245661481 has 16 divisors (see below), whose sum is σ = 269256960. Its totient is φ = 222768000.

The previous prime is 245661473. The next prime is 245661497. The reversal of 245661481 is 184166542.

It is not a de Polignac number, because 245661481 - 2³ = 245661473 is a prime.

It is a super-2 number, since 2×245661481² = 120699126494226722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245661481.

It is not an unprimeable number, because it can be changed into a prime (245661421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257301 + ... + 258253.

It is an arithmetic number, because the mean of its divisors is an integer number (16828560).

Almost surely, 2^245661481 is an apocalyptic number.

It is an amenable number.

245661481 is a deficient number, since it is larger than the sum of its proper divisors (23595479).

245661481 is a wasteful number, since it uses less digits than its factorization.

245661481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296.

The product of its digits is 46080, while the sum is 37.

The square root of 245661481 is about 15673.5918346753. The cubic root of 245661481 is about 626.2951115640.

The spelling of 245661481 in words is "two hundred forty-five million, six hundred sixty-one thousand, four hundred eighty-one".