5242621561 has 4 divisors (see below), whose sum is σ = 5320869712. Its totient is φ = 5164373412.

The previous prime is 5242621547. The next prime is 5242621591. The reversal of 5242621561 is 1651262425.

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 5242621561 - 2⁹ = 5242621049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5242621591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39123975 + ... + 39124108.

It is an arithmetic number, because the mean of its divisors is an integer number (1330217428).

Almost surely, 2^5242621561 is an apocalyptic number.

It is an amenable number.

5242621561 is a deficient number, since it is larger than the sum of its proper divisors (78248151).

5242621561 is an equidigital number, since it uses as much as digits as its factorization.

5242621561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78248150.

The product of its digits is 28800, while the sum is 34.

The square root of 5242621561 is about 72405.9497624332. The cubic root of 5242621561 is about 1737.1987295808.

Adding to 5242621561 its reverse (1651262425), we get a palindrome (6893883986).

The spelling of 5242621561 in words is "five billion, two hundred forty-two million, six hundred twenty-one thousand, five hundred sixty-one".