245355521 has 8 divisors (see below), whose sum is σ = 253010688. Its totient is φ = 237780000.

The previous prime is 245355511. The next prime is 245355589. The reversal of 245355521 is 125553542.

245355521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 245355521 - 2¹⁰ = 245354497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245355511) 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, 13625 + ... + 26006.

It is an arithmetic number, because the mean of its divisors is an integer number (31626336).

Almost surely, 2^245355521 is an apocalyptic number.

It is an amenable number.

245355521 is a deficient number, since it is larger than the sum of its proper divisors (7655167).

245355521 is a wasteful number, since it uses less digits than its factorization.

245355521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39823.

The product of its digits is 30000, while the sum is 32.

The square root of 245355521 is about 15663.8284273035. The cubic root of 245355521 is about 626.0349963593.

The spelling of 245355521 in words is "two hundred forty-five million, three hundred fifty-five thousand, five hundred twenty-one".