245653521 has 16 divisors (see below), whose sum is σ = 334540800. Its totient is φ = 160292048.

The previous prime is 245653511. The next prime is 245653549. The reversal of 245653521 is 125356542.

It is a cyclic number.

It is not a de Polignac number, because 245653521 - 2¹³ = 245645329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245653511) 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, 39400 + ... + 45206.

It is an arithmetic number, because the mean of its divisors is an integer number (20908800).

Almost surely, 2^245653521 is an apocalyptic number.

It is an amenable number.

245653521 is a deficient number, since it is larger than the sum of its proper divisors (88887279).

245653521 is a wasteful number, since it uses less digits than its factorization.

245653521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108.

The product of its digits is 36000, while the sum is 33.

The square root of 245653521 is about 15673.3379023104. The cubic root of 245653521 is about 626.2883470210.

The spelling of 245653521 in words is "two hundred forty-five million, six hundred fifty-three thousand, five hundred twenty-one".