245455581 has 8 divisors (see below), whose sum is σ = 374027584. Its totient is φ = 140260320.

The previous prime is 245455543. The next prime is 245455589. The reversal of 245455581 is 185554542.

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

It is not a de Polignac number, because 245455581 - 2⁷ = 245455453 is a prime.

It is a super-2 number, since 2×245455581² = 120496884488095122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245455589) 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, 5844160 + ... + 5844201.

It is an arithmetic number, because the mean of its divisors is an integer number (46753448).

Almost surely, 2^245455581 is an apocalyptic number.

245455581 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

245455581 is a deficient number, since it is larger than the sum of its proper divisors (128572003).

245455581 is a wasteful number, since it uses less digits than its factorization.

245455581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11688371.

The product of its digits is 160000, while the sum is 39.

The square root of 245455581 is about 15667.0220846209. The cubic root of 245455581 is about 626.1200872349.

The spelling of 245455581 in words is "two hundred forty-five million, four hundred fifty-five thousand, five hundred eighty-one".