245613553 has 4 divisors (see below), whose sum is σ = 245690368. Its totient is φ = 245536740.

The previous prime is 245613541. The next prime is 245613559. The reversal of 245613553 is 355316542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245613553 - 2¹⁷ = 245482481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245613559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33393 + ... + 40078.

It is an arithmetic number, because the mean of its divisors is an integer number (61422592).

Almost surely, 2^245613553 is an apocalyptic number.

It is an amenable number.

245613553 is a deficient number, since it is larger than the sum of its proper divisors (76815).

245613553 is an equidigital number, since it uses as much as digits as its factorization.

245613553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76814.

The product of its digits is 54000, while the sum is 34.

The square root of 245613553 is about 15672.0628189144. The cubic root of 245613553 is about 626.2543793278.

The spelling of 245613553 in words is "two hundred forty-five million, six hundred thirteen thousand, five hundred fifty-three".