5240366561 has 4 divisors (see below), whose sum is σ = 5240516400. Its totient is φ = 5240216724.

The previous prime is 5240366533. The next prime is 5240366563. The reversal of 5240366561 is 1656630425.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5240366561 - 2²² = 5236172257 is a prime.

It is a super-2 number, since 2×5240366561² = 54922883387293933442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5240366563) 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, 8510 + ... + 102728.

It is an arithmetic number, because the mean of its divisors is an integer number (1310129100).

Almost surely, 2^5240366561 is an apocalyptic number.

It is an amenable number.

5240366561 is a deficient number, since it is larger than the sum of its proper divisors (149839).

5240366561 is an equidigital number, since it uses as much as digits as its factorization.

5240366561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149838.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 5240366561 is about 72390.3761628574. The cubic root of 5240366561 is about 1736.9496210713.

Adding to 5240366561 its reverse (1656630425), we get a palindrome (6896996986).

The spelling of 5240366561 in words is "five billion, two hundred forty million, three hundred sixty-six thousand, five hundred sixty-one".