240523561 has 4 divisors (see below), whose sum is σ = 240570000. Its totient is φ = 240477124.

The previous prime is 240523559. The next prime is 240523571. The reversal of 240523561 is 165325042.

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 240523561 - 2¹ = 240523559 is a prime.

It is a super-2 number, since 2×240523561² = 115703166792241442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240523541) 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 3 ways as a sum of consecutive naturals, for example, 14311 + ... + 26188.

It is an arithmetic number, because the mean of its divisors is an integer number (60142500).

Almost surely, 2^240523561 is an apocalyptic number.

It is an amenable number.

240523561 is a deficient number, since it is larger than the sum of its proper divisors (46439).

240523561 is an equidigital number, since it uses as much as digits as its factorization.

240523561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46438.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 240523561 is about 15508.8220377951. The cubic root of 240523561 is about 621.8980690280.

The spelling of 240523561 in words is "two hundred forty million, five hundred twenty-three thousand, five hundred sixty-one".