245031556 has 72 divisors (see below), whose sum is σ = 563068800. Its totient is φ = 92151360.

The previous prime is 245031551. The next prime is 245031559. The reversal of 245031556 is 655130542.

It is a super-2 number, since 2×245031556² = 120080926871562272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245031551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60565 + ... + 64483.

It is an arithmetic number, because the mean of its divisors is an integer number (7820400).

Almost surely, 2^245031556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245031556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281534400).

245031556 is an abundant number, since it is smaller than the sum of its proper divisors (318037244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245031556 is a wasteful number, since it uses less digits than its factorization.

245031556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977 (or 3968 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 245031556 is about 15653.4838294866. The cubic root of 245031556 is about 625.7593381952.

The spelling of 245031556 in words is "two hundred forty-five million, thirty-one thousand, five hundred fifty-six".