531361543515401 has 4 divisors (see below), whose sum is σ = 531361646864400. Its totient is φ = 531361440166404.

The previous prime is 531361543515367. The next prime is 531361543515487. The reversal of 531361543515401 is 104515345163135.

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 a de Polignac number, because none of the positive numbers 2^k-531361543515401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531361543595401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43534991 + ... + 54387668.

It is an arithmetic number, because the mean of its divisors is an integer number (132840411716100).

Almost surely, 2^{531361543515401} is an apocalyptic number.

It is an amenable number.

531361543515401 is a deficient number, since it is larger than the sum of its proper divisors (103348999).

531361543515401 is an equidigital number, since it uses as much as digits as its factorization.

531361543515401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103348998.

The product of its (nonzero) digits is 1620000, while the sum is 47.

Adding to 531361543515401 its reverse (104515345163135), we get a palindrome (635876888678536).

The spelling of 531361543515401 in words is "five hundred thirty-one trillion, three hundred sixty-one billion, five hundred forty-three million, five hundred fifteen thousand, four hundred one".