248605521 has 4 divisors (see below), whose sum is σ = 331474032. Its totient is φ = 165737012.

The previous prime is 248605507. The next prime is 248605547. The reversal of 248605521 is 125506842.

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 248605521 - 2⁷ = 248605393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (248605121) 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, 41434251 + ... + 41434256.

It is an arithmetic number, because the mean of its divisors is an integer number (82868508).

Almost surely, 2^248605521 is an apocalyptic number.

It is an amenable number.

248605521 is a deficient number, since it is larger than the sum of its proper divisors (82868511).

248605521 is an equidigital number, since it uses as much as digits as its factorization.

248605521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82868510.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 248605521 is about 15767.2293380923. The cubic root of 248605521 is about 628.7870514260.

It can be divided in two parts, 24860 and 5521, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 248605521 in words is "two hundred forty-eight million, six hundred five thousand, five hundred twenty-one".