531551133550123 has 4 divisors (see below), whose sum is σ = 531551227072048. Its totient is φ = 531551040028200.

The previous prime is 531551133550093. The next prime is 531551133550153. The reversal of 531551133550123 is 321055331155135.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (531551133550093) and next prime (531551133550153).

It is a cyclic number.

It is not a de Polignac number, because 531551133550123 - 2¹⁷ = 531551133419051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531551133550123.

It is not an unprimeable number, because it can be changed into a prime (531551133550153) 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, 37642728 + ... + 49800373.

It is an arithmetic number, because the mean of its divisors is an integer number (132887806768012).

Almost surely, 2^{531551133550123} is an apocalyptic number.

531551133550123 is a deficient number, since it is larger than the sum of its proper divisors (93521925).

531551133550123 is an equidigital number, since it uses as much as digits as its factorization.

531551133550123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93521924.

The product of its (nonzero) digits is 506250, while the sum is 43.

The spelling of 531551133550123 in words is "five hundred thirty-one trillion, five hundred fifty-one billion, one hundred thirty-three million, five hundred fifty thousand, one hundred twenty-three".